Seems like my last post was too vaguely worded: I did not mean to punish people for "poor RP", in fact with poor RP I was referring to invalid RP, according to "acceptable RP" as Raekh wrote.
As for "madness RP", the content does not matter at all, make it a plot concerning flowers, love, peace and cuddling, or one about insane night stalkers - what matters is if it is valid according to the setting and the covenant, or just a fake "RP" as an excuse for OOCly bugging people (intentionally or by ignorance). For the latter, I am not really sure if facing OOCish behavior by ICish means like imprisoning is a good and appropriate idea, since such won't teach the difference between valid and invalid but might even encourage to continue acting in a way not supporting a RP-focused game.