You should also be careful of people you aggravate on the freeway as well. People these days won't think twice about putting a bullet in your a$$. And if he really wants to show off to the girl in the passenger seat. Who knows what he could do.
In Redwood City last year, some guy was riding another persons bumper for a few blocks, when suddenly the guy came to a complete halt, got out, walked up to the passenger window, and blasted his a$$. Then casually got back in his car and drove away. The person who got shot got lucky that Kaiser hospital was right across the street and went there to be treated.
I don't ever tailgate people. You don't know how enraged it might make them or how loony the person is.