Here's a perfect example of what we deal with when we're not pulling you all off each other and trying to figure out who started it.
Spammer this morning signed up in April from Ukraine. The boss wants us to allow foreign signups because there are active members here who "travel".
The ISP looked clean (not previously reported for SPAM) so the account was activated.
Damned thing lied dormant until this morning, when it posted spam.
I'll discuss with HMFIC about whether we can set a switch to toggle off accounts that signup and then go dormant for a period time. There are likely more of them. I've been putting some questionable signups on a manual watch list of my own lately, but it's not an effective measure.