I moderate a forum on a different site, and lately we've been having a spam problem. Each new captcha or human verification we add just triggers whoever writes these bots to work around it, sometimes in a matter of days. It's an incredibly popular site to begin with, so adding admin verification would be impractical.
There are a number of people to blame for this:
I always figure targetting a problem at its source is the best way of solving it, so listen up. If you're a celebrity, and you're reading this, please start wearing a woolly jumper, and some kind of reflective anti camera-flash coating. Stay indoors - in fact, stay indoors in general, you have no purpose to begin with without junking up forums on the side. Change your name. Stop being vaguely attractive. And God damn it, stop exposing yourselves in public.
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yeah, celebrities and their shenanigans get on my nerves too! That's why I made a blog with funny pictures of them. =D
All of those celebrities are really ugly as well.