Not nice. Usually, what comes round, goes round.

When my V1 goes off and it's obvious there's a cop or if I see him I almost always tap my brakes for drivers behind. I've even slowed people down with a wave out my window. If going the other direction will sometimes flash my lights. Before I had a detector people doing this for me have saved my arse, just returning the favor. Mean people (usually they're just unhappy w/ themselves) suck, that sorta thing. But you're forgiven son.