To veer back towards the original topic, though: There is, indeed, an official Wiki page that talks about getting GMs to invalidate roleplays. This is ancient, horrifically out of date, and not remotely relevant to BattleMaster. That part of the document is intended for SpellMaster in its various forms.
Uh, no it is not. It was originally inspired by SpellMaster, but it is very much intended for BM.
And right now the only GM around is me. Because frankly, we haven't had to officially invalidate a roleplay in at least 5 years and probably longer. I really am not sure if we've ever done it.