Yes, Lemmyverse will fragment, so it's important to choose sufficiently permissive instances or even run your own.

I got banned from a vegan group once because I responded to a person talking about how “non-vegans must be sociopaths to not care about all the suffering of animals as they scream in pain” or something like that. I responded with a link to a study that plants do in fact scream when being injured. We just can’t hear it. Apparently they didn’t like that, lol.

Edit to add: I didn’t just respond with a link. But something like “As much as I appreciate veganism I am not sure what to tell you. Because if avoiding screaming and suffering in your food source is the reason you became vegan I do have some bad news ”

I feel like there's a difference between various moderators power-tripping on their own little fiefdoms, and a site wide policy.