I get to climb towers as part of my job - maybe a dozen times a year. Depends on what shit decides to break. Just have to pay attention to what you're doing.
Our tallest one is only about 240', and most climbs are only about 100', depending on where the equipment is. But if you're up about 30' and fall off, you're dead anyway. It's never bothered me - you just have to trust your gear and make sure you're hooked on. I'm still doing it at 57, but I'm not up to climbing one of those really tall ones. The young guys can do that for me now.
We work on overhead sign structures over live freeway lanes too. Most of them have no catwalks - we stand on the structure itself. That's really fun if there's a lane closure as well, because all the idiots going by underneath are good and pissed from being backed up a ways. But then they bitch when the roads don't work right....
.......saw that in my email and I thought, “That’s pretty funny”, I was totally crackin’up....then saw the post (which was great), you missed your shot at that, would’ve been hilarious! 
