There was just a spam post in the rules forum and it reminded me of the bot trap concept and maybe you will want to do this if spam bots ever start to be an issue.
You limit 0-post posters to only posting in one specific subforum. You say which forum it is in the index and ToS and wherever else. It's, you know, an Introductions forum or something. Posting there makes you a 1-post poster who no longer has that limitation.
Then spam bots fail to know that they have to post in that forum and so fail to post at all and that's that.
