One of the biggest annoyances for me is when people enter some subculture, then demand the subculture to change to acommodate them rather than them changing to acommodate the subculture.

I had it happen a few times that it changed to something unrecognizable to me and thus I left it for a new one.

So at this point, I feel like gatekeeping, (ofc not based on race gender or such things, but rather specifics to the subculture) has become mandatory, even at the cost of keeping a, possibly sizeable, portion of genuinly interested people out.