Quote from: borpolev on February 05, 2018, 03:28:06 PM

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.