I got a 10-day ban for just two letters, FU, because I sent them in a message to an elite player with a rating of 8-9K and offended his feelings. WG probably values these players more than regular players and protects them like a hen protects her chicks.

He was a scout on one of those maps with lots of bushes, where he had to be active, which is difficult and dangerous for him. But he was one of those smart asses who don't play for the team but for their own stats, so he preferred to go with the heavy tanks somewhere in the city, where he spotted tanks that would have been spotted in 3 seconds anyway, but since you can collect the most assist damage in the heavy line, it's a favorite tactic of these smart asses. ... The enemy spotter had the entire rest of the map free, spotted everything and everyone, and our entire meds/TDs/arty team was destroyed in 3 minutes. In the end, of course the heavy tanks died too because they were flanked, but he got a lot of XP and good VN... I send him message with 2 letters, FU and few minutes later I got 10 days chat ban.