I think kidakaka meant "captcha"
Its the image verification thing where you have to enter the set of letters you see on the screen. This sorta helps combat the robot spams, but doesnt do much to human spammers. At most, it'll annoy them
Regarding blocking IP's.. its a good idea as long as they are static IPs (likely if they are a dedicated spamming company
). If they are individual spammers using dynamic IPs, blocking them would also block others who will be given that same IP address from their ISP later. Theres collateral damage there!
Quote:
Manual moderation is a good idea. But if there are interested programmers, we can get a virtual moderation tool designed. The way they use it in Wikipedia 
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Oh, is it like how you can click on the [edit] link for an article?
I notice we have that "report post" button for each post. Other CEans can help report the spam, I suppose. Avoids us having to dig around for spam, haha.