Not just the mods but the admins are using the deceptive database manipulation practices. i.e. this is not a fixable problem by merely appealing one layer up from a mod of a community - the only layer above admins is defederation from the Fediverse overall, which is what OP is advocating.

It is a pain yes, but also it only takes 2 clicks to migrate your settings from one instance to another - go to Settings and under "Import/Export Settings" click the big Export button, then in the new click Import. With a similar iconic avatar and name, people likely won't even notice the difference. Your old comments/posts/points won't transfer though. Bonus: you can keep both, so while e.g. one instance is upgrading you still have another with which to read/reply/etc.

People on lemmy.ml are going to notice a noticeably reduced functionality over the next several months regardless, as many, Many, MANY users start blocking the instance on a personal/user level even if not an instance-wide block. Imagine every single comment you write receives 10x fewer replies back, or votes, just you shouting into the void, and the only people responding back... are the fascists, and those more neutral to fascism.

So OP is bringing up the problem, which is the first step towards healing. :-)