I’m not sure about private communities, but maybe someone else can chime in. I know you can disable comments and posts at the very least.
I understand where you’re coming from with your opinion and I don’t think it’s incorrect in any way, but I still personally disagree. A conversation requires two people and if you block off one end it’s no longer that. Just like you mention, they will tired eventually and move on. I’m not sure if Lemmy allows blocked users to comment on posts by users they’ve been blocked by actually though. I would hope not at least because that is a situation I absolutely do not think should be allowed.
I’ve posted my own OC before and I understand completely how fucking weird and aggressive people can be. I don’t want to go into details because this isn’t the place for it but on top of being kink-friendly I have a body type that invites some of the more depraved people. Enough so that I’m really not interested in posting myself any longer.
I just don’t want to see this place turn into the same version of walled gardens that Reddit ended up as. We’ve interacted enough at this point where I think you have a sense of my personality and even I’ve been banned and blocked for some very innocuous comments in the past when the reality is that if I had been told I crossed a line I would have apologized. I know that obviously everyone isn’t as reasonable or understanding, but just like with the conversation with downvotes, you can’t force a user to use a tool appropriately and there will always be bad actors on both sides. I think the one-way communication block allows for the least exploitation while still accomplishing the goal.