Well, there is one thing people usually overlook when "spam" is concerned... And that's that companies hire people to spam in most cases; so a human is capable of defeating a signup and posting whatever they have to.
In this method, it doesn't matter what your security precaution is, a human can still break through a captcha, as that's what it's meant for.
Yeah, but when dealing with low of a volume it's not too much of an issue. When the bot net gets running it's like 300 users a day.
What seems to have help is using a human verification sytem of question and answers.
IE:
Q: What is the second to last word in this sentence, prostar 197?
A: prostar
With this methode it seems you could pretty much ensure, for the time being, that only ATK humans would get in.
