People will be able to discern who is who based on avatars, merit count, merit history, signature, rank, and probably other things. The point is a random username won't do much if people can still find out who is who IMO. You would need to randomize everything.
Including previous posts 😂. I don't think there are any other way but to create an alternative account.
discussions can sometimes be influenced by biases
Consider it from a social community perspective. You go to community clubs or be with your friends or people you like everyday. You can not be friends to everyone in your city or country. This will exists.