- Blacklisting services such as fspamlist, StopForumSpam and BotScout keep databases of IP addresses, usernames and e-mail addresses used to post spam or register forum accounts. Forum software can query these lists and either deny posts or registration, or submit the request for human moderation.
- Manual registration approval by administrators for each account.
- Using a search engine to investigate usernames for hits as recognized spambots on other forums.
- Blocking posts or registrations that contain certain blacklisted words.
I wonder if you know about any other antispam filtering method used on Bitcointalk? Or any other good filtering method used on other forums, that is not mentioned above?
Have a good day !
Boris
1) Done automatically when an account from one IP is banned.
2) The Evil points(or something similar if I remember correctly) system, where you have to pay a certain amount of BTC to get whitelisted if you're from a certain set of IP addresses.
3) Not exactly but I believe the bot managed by Mitchell does something similar
4) Same as 3.