I mean, most of the communities that are heavy handed in their moderation like this, are building themselves to becomes extreme echo chambers. Examples include c/world, c/politicalmemes. One of the worst betrayers of this was @flyingsquid who would regularly get into flame wars with people, then proceed to use their mod authority to ban them. And as much as people complain about people like @jordunlund, they are far, far better as a mod in not abusing their mod authority in this manner (although they have, and its been documented).

However, lemmy is small. And the reality is that the “kinds” of conversations that might happen only in one community are actually happening all over the place. The “conversation” happens wherever the conversation might be.

So instead of worrying to much about it getting unbanned from fiefdoms, you might consider starting your own communities, or taking the conversations you would imagine happening in banned communities elsewhere. The fact is, that the attention and people will follow you if you have good things to say.