[quote=@Ellri]
True, hadn't considered the farm account type, [@Mahz]. But only a fraction of spambots are of that type, yes? 
[/quote]

Yes, but sometimes they're the hardest to control because a large sum of them can be built up over time and released at any given point. Because the mods won't be able to spot them in the new user listings, they might have to go through the IPs and often that can be a bit tricky when they could be linked up to proxy generators.

Ultimately it comes down to how complicated the coder wants to make the bot. They can even make them act as a fake human in the intro section with a vague [i]"Hello. I'm new"[/i] that people may dismiss as a normal timid member until they change to bot mode a month or so later.

EDIT: Holy crap my grammar is bad tonight :P