PSWe are "virtually" socializing when we interact on the net. If someone felt that they had the right to make comments about me or to me without telling me their name (or nickname) when asked, in any other social environment, I would seriously wonder why and I would stop talking to them.
If they persisted, I would tell them to leave me alone in increasingly unpleasant language, and probably prepare to protect myself.
Think about it.
It's very strange behaviour.
hmmmmmm.........
lox