Hello,
Reporting a player for horn spamming would definitely get declined. By time the Game Moderstor looks like the report he will look at it has like nothing happen and it was just a horn. Keep this is mind a horn has nothing to do with ramming, reckless driving, trolling, blockimg, hacking, etc.. i think I'll have to change my mind (-1) its easier for an admin just to kick the user than having a whole bunch of people getting kicked with no notice.
My suggestion is - "having an warning pop up on your screen (in game chat) saying (you have been using your horn to much, you have 5s to stop horn spamming) or something similar to that.
Best regards,
-Carmella l Viva Trucking