5 Techniques To Deal With Spam: Open Letter To Twitter

I enjoyed this post and thought it had some pretty good ideas (particularly the last one), but I disagree with the idea of any major limits on non-verified accounts (if verification were made more open) as many would not want to input some personal detail like a credit card to verify a social networking account, I think. Though, admittedly, I'm not an expert–Second Life did this and eventually got rid of it as I suspect it deterred sign ups.

Also, I don't at all like the idea of displaying a CAPTCHA–I'm sure the other ideas mentioned can deter spam enough to not irritate the many more legitimate users. Part of the process of discovering other users on Twitter, I think, includes being able to easily and freely reply to someone else.