It was impossible to detect bot posting by the post content with those threads allowed.
That said, you can hide bot posts just as well in these:
General Chat >
What's the last thing you've eaten?General Chat >
The Weather ThreadGeneral Chat >
Chinese thread (note the interspersed dawn XP posts and posts meaning effectively "daily post"
General Chat >
What did you do today?General Chat >
How do you feel today?The "post a pic" type threads can be used with only a little more work, e.g. periodically stocking a folder with candidates. But you don't even have to do that; your script can just pull a random pic from danbooru and post it to the
themeless thread, or a random pic from derpibooru and post it to one or the other pony thread.
I'd suggest making people solve a captcha for their first post of every day. (A site-local one, please, not a Google captcha, or I'd have to quit, since I boycott everything related to that privacy sink in Mountain View.)
[edit]
People who don't know English can make a thread for their language, e.g. we have a Japanese thread, Chinese thread with some genuine content, and a Thai thread. But to moderate them, you'd need moderators who spoke each language and had the time every day.
This post has been edited by mechafujoshi: Apr 11 2015, 23:42