There are people here who I recognize by a combination of avatar, name and their posting style. Since avatars have easily changed in the past and still do, avatars are clearly not a link to the person/account. Now that names are similarly "fluid", I don't pay as close attention to names. It's what an account posts that really matters. If someone is concerned or likes having a long-term reputation on the forums, they tend to keep all 3 (name, avatar and posts) consistent. If I see someone whose posts are noise, offensive or rule-breaking, then the avatar and/or name is irrelevant. The post (and the account associated with it) is getting hidden, reported, muted, or banned. No matter who the account "really is". So, if someone copies another user's name and then starts making trouble? It's the posts by that account that will get hidden, muted, reported and it will be that account that gets dealt with, not the name, not the avatar.