Most of my knowledge about the base level living conditions in Latin America is from sites like the TheYNC, TheWorldWatch, Goregrish forums, etc. They are "relatively safe", and that means the tourist spots, commercial and internationally-catered districts of large cities and the real out of the way villages and hamlets that TV crews love to visit, whom try to put on the best appearance and hospitality for visitors.
Things to watch out for:
Even in the "relatively safe" areas, they are far more volatile than even the more dangerous urban places in the USA, with the exception of some of the urban hoods like Chicago's O-Block, whose activities sometimes exceed the violence of the favelas. There is A LOT of sicario and drug gang retaliation activity, and I mean A LOT. Sicario hit crews are highly nomadic and their preferred form of transport are motorbikes. A targeted hit can happen anywhere, but bars, nightclubs, local small blue collar eateries, barbershops, and auto machanic shops seem to be the places where sicarios target, because their targets often hang out in these locations. Gang members love to sit in these places and talk business and drink.
Most of the time, sicario hitmen try to run up close to their targets, mag dump them at almost pointblank range, and then ride off again. Not always the norm though. Some crews will just sit outside and spray the entire targeted location with fully automatic fire and shotgun blasts. In those cases, very slim chance of survival for innocents caught in the area. Outside of tourist central, try to avoid the nightclubs and alcohol/gambling environments. Trouble often comes and they come FAST.
Another thing to remember, the cops are CORRUPT to the core. It is virtually the same throughout Latin America. It is not uncommon for police officers to also be members of vicious home invasion crews or organized robbery rings, and of course, the cartels. If you are a victim of assault, going to the police will not yield any results. In the worst cases, if a responding officer happens to be a member or working for the gang that robbed or assaulted you, now you will be in real trouble, because you now may very well be the next target of a cold blooded street hit.
The main rule of safe living for the people there is basically BE ARMED, and BE QUICKER TO DRAW. While the Hollywood Wild West often exaggerates the amount of violence that actually happened in the real Old West, in Latin America, it is actually the truest representation of the Hollywood shoot em' up western. Unlike in the USA, most incidents of even non-gang affiliated home invasions and store robberies of innocent victims are also extremely violent. Groups of gunmen, often wearing armor, are involved and any resistance means the entire household or store receives a fusillade aimed to kill. No fucks are given by them either. Videos of the aftermath of these incidents often show corpses of young children lying among their dead parents, riddled with bullet holes. Gun laws for law abiding people vary from country to country and the most pragmatic people are always armed to the teeth. In gun friendlier areas like Ecuador, Peru, Guatemala, etc, those who are smart will make it a first priority to arm themselves and become very proficient with their weapon of choice. An equally high amount of sicarios and armed robbers are also gunned down every day by their would-be victims. The simple and cost effective pump shotgun is the primary choice of weaponry for the smart store owner or homeowner in high crime areas, and they ARE very quick to shoot at the first sign of trouble. There is nothing more devastating within 20 yards than a 12 gauge buckshot shell and there is a constant stream of new uploads to illustrate it.
Sit down with your stepson and research Ecuador's gun laws and other weapons laws first. Ecuador is one of the more gun friendly countries but for a tourist, they may be different so it is best to find out first. If they allow limited ownership/carry for tourists, he and his crew will NOT go wrong with one or a couple of shotguns with them. It is better to have them and hope to God, not need them, than finding yourself facing multiple drug hitmen one day who are targeting someone else but decided to eliminate all the witnesses at the scene. That shit DOES happen.
Other things, do NOT run afoul of the law and try not to seek assistance from them whenever possible. Latin American prisons are a new level of hell, and due to the corruption and affiliation with organized crime by the police themselves, spending any amount of time among them, whether to file a report or a witness statement or anything, puts you in jeopardy of being a target for somebody. And that leads to another important thing: YOU AIN'T SEEN NOTHING. Remember that. You may be on the street and saw somebody getting robbed and the police are going around getting statements. YOU DIDN'T SEE ANYTHING. It is instinctive for most of us to do good deeds and help out, but that is NOT one of the places to do so. You don't know who was behind that crime and you may have placed yourself in the sights of a cartel hit squad once you decide to play good samaritan and open your mouth. Everybody got phones, everybody is recording, and everybody LOVES to post stuff on social media, so if you are caught on video getting involved where you are not supposed to be, you will be a dead man.
Last but not least, AVOID trouble hotspots. Nightclubs and bars are sites of routine gang violence and movie style shootouts. Barbershops as well, in addition to being targets of robberies. Be smart and good luck on the trip.