"What you are doing, dickhead, is stupid and irresponsible. Not to mention childish."
Now Bob, you don't know this guy well enough to call him "Dick" Head, you should have more respect and address him as Richard.
Childish pretty much sums it up. I keep wondering if his name might be "Tiny" Brigman, Freeman Latrell or maybe Merle Stoval.
Davey S.