Flood detected could occur on Tor is too many Tor posts come in at once - like when /polru/ is flooded by the regular attacker - such as the life when all idiots think they are waging their private wars on the internet.
Tor users count as one. They don't even get ID or IP hash because of this.

All right I'm reading the replies this  >>/86219/ is quite reasonable. Thank you, good post that explains things.

 >>/86212/
There is no O (uppercase o), you might mistook c/C with it. As I told you on /operate/

 >>/86232/
> Неправда, клевета и ложь. На /bb ещё раз надо вводить какую-то. 
/bb/ has captcha enabled for both thread creation and posting within a thread.
Why? My guess is because of the recent schizo posting I mentioned here:  >>/86624/

Jesus, this is a long thread. I really hope it's not about the same thing back and forth.