He isn’t respecting the rules indeed. The most pilots in expert server are professional and follow the rules of the expert server, it is sad to see that some pilots are not following the rules and anoying other pilots their flight. But I don’t realy know if the moderation team can do something about this, I am not sure about that. You have to wait on their respond.
Skill is not exactly equivalent to grade in Infinite Flight. Obtaining Grade 3 is rather easy for anyone to achieve, regardless of whether or not they actually do things professionally.
At this point, expect the topic to be closed, and PM them instead. It may be possible that the user does now speak english, seeing the name, but attempt to PM first and then find other options of communication.
Happens all the time unfortunately. Sadly if IFATC isn’t online controlling an airport, it’s impossible to report them and get them a violation. I usually just ignore them.
As much as I love the expert server, sometimes people just do not care about their surroundings, especially when ATC is not active.
I do understand that people not having professionalism on the expert server sucks, but we just have to suck it up and deal with it.
It is usually annoying, knowing that you pay monthly to have the greatest realism and in the expert server they usually interrupt a flight, or also that they escort you without your permission.