My dear Pablete, you drive in the same class, same car, same UFBaby.
finally i drive by inside of him and the guy lose control...and crash me.
I doubt he looses control, just new to racing. You can see that in every corner and he is using his hazard lights to indicate that as well.
If you got crashed of the track by him after overtaking then I would have removed him from the server for a couple of days but overtaking a newbie in the same car, at the worst possible spot of Westhill, isn't exactly pro racing. If you took the momentum in the very same chicane you could easily overtake him on the straight maybe even with help of a little drafting.
who think are driving alone on track, should be warning and/or banned
You are using my words from your own report and penalty now?
He is not driving alone, he is racing with you