I hope you won’t become a pariah regardless, but if you are extra-worried then there are occasional “stupid question” threads which might be usable as “stupid idea” threads too. (Not to imply that either the questions or the ideas are necessarily stupid, but the point is that even if they are the norm in such threads is meant to be to (1) be nice and (2) not inflict reputational damage on the person saying stupid things.)
I hope you won’t become a pariah regardless, but if you are extra-worried then there are occasional “stupid question” threads which might be usable as “stupid idea” threads too. (Not to imply that either the questions or the ideas are necessarily stupid, but the point is that even if they are the norm in such threads is meant to be to (1) be nice and (2) not inflict reputational damage on the person saying stupid things.)