When you have a daughter....

[gamblore99]

Scaring your daughters prospective suitors is a bad idea, unless done solely for comical reasons. If I bring a girl over to my house, I would expect my housemates to be polite and well mannered, not do something really stupid and compromise my chances with this girl.

So what you scare this one boy away? Next time she will just not introduce you to the boy and you will become more out of the loop. A lot of peopel said keep a close and open relationship with her, and hope she makes good decisions. That is solid advice.