Is impersonation a possible problem in the fediverse?
I mean, pretending to be someone in another instance, "stealing" the username, is trivial. I see the more likely targets being instance admins or high profile users. Should we worry somewhat about this?
Yes, for sure. While the identity of a user can be checked, nobody is going to do this every time. IMO the simplest solution would be to just always show the instance even if a display name is set.
I feel like they could solve it by adding instance only when another user with similar name is present in the comment section. It would make it clear that a duplicate username is present without changing a lot for a majority of lemmy-commenr sections.