I'm questioning what the "D" Stands for in "Dangerous D".....
The best way to present my opinion in the matter is thus: If some guy, say 18, sleeps with my underage 15-16 daughter, I'd probably be going to jail and get sued for aggravated assault....Providing somebody stopped me in time and I wasn't able to hide the body. Though before initiating any sort of violence I would be inclined to find out the whole situation behind it, such as if my daughter lied about her age and if it was indeed consentual. If this is the case, I can't say that I would not be dissapointed, but I would definitely urge my daughter and the guy in question not to in a hopefully reasonable and intelligent manner.
....Or there's the good old baseball bat method.