Why is putting people on tilt wrong/unethical?

I usually don't worry about putting people on tilt. They do that all on their own. If I end up getting lucky and win by a bad beat, I am grateful and apologize to the guy for his crummy luck. I am stuck in a chair for hours; last thing I want is a negative vibe around the table. Plus someone on tilt can ruin it for the rest of us. I have seen fishes who come to play ring games for fun (and look totally shocked when someone is cursing and hitting the table) which has had to force me to be a consultant towards them in order for them to feel comfortable enough to continue spending their money. Like someone has already said it just unprofitable.