Code: con_filter_text_out "Too many popups! Rendering will be bad!"; con_filter_enable 1 I found this one while toying around with the particle editor. Might help someone who is annoyed by that useless error message like me.
Thats more a workaround then solution. Would be better if someone could find the cause of the bug and fix it instead of just hiding it.
For griefers what I find very easy to do, is to hit status in the console, then just type "screenshot" and you'll end up with a .tga of your console screen including their SteamID. But nice find Brutos