I’m part of the admin team for a group on Facebook dedicated to a niche wargame. Anyone can apply to join but there is an entry question. The question itself tells the user where to find the answer (it’s both on Wikipedia and in the rules of the group!). We still get people that either don’t answer or put something like “I can’t be bothered looking it up”.
Those people do not get to join.
I’m firmly of the belief that if people are working to maintain a space for you then it’s on you to put a bare minimum of effort in to be allowed to use that space. We curate the group to keep content on topic and try to keep it a nice place to be.
The nuance is of course in what level of gatekeeping is healthy.
He used to be on a podcast I listen to (Bad Voltage) and there was an episode (pre-pandemic) where he came out as anti-vaccinations. I didn’t listen to the show again until he left. I have zero time for people who think they know better than their children’s doctors.