Now I'm not saying unlimited BAs can be given for every question but some questions have numerous good, and different, answers like those for moveset questions (if a Pokemon is equally as good for different roles) and so more than 1 answer could be considered 'the best'.
There would have to be some moderation so as to ensure that this ability isn't abused like only certain questions have this ability [see final statement] and moderators and what-not can take off all BAs - besides the original BA - and restrict more than 1 BA being given for a question [done on individual cases].
(This is for questions with opinionated answers not those with just facts needed as they only need 1 BA.)