The vocal group is what sets the tone though. I can't count the number of times I've heard about someone's poor behavior either second hand or because someone decided to 'warn' me for one reason or another. I do go in with my hackles raised to defend myself in those cases, even if I'm aware it is happening and try to avoid the bias.
Someone of whom a vocal group has spoken out about are more likely to not be able to get into something.
As in all things, this is not a zero-sum game. There are so many shades of gray from the person being a super disgusting creeper who is terrible to the person who legit didn't know but tried to fix when told in this it isn't possible to capture all.
Just a recognition that the voices that speak the loudest get heard and thus listened to the most.
Edit: typos, commas.