Speeding and Speed Traps

I'm driving down the road and a speeding car goes speeding by me at a fairly good clip. My first thought is, "I hope that guy gets a ticket. Where's a cop when you need one." A couple days later I'm driving along and I see a speed trap. A couple cops are waiting with radar guns to catch people speeding as they come around a corner. Do I think to myself, "Oh good, now all those speeders will get tickets." Of course not, I start flashing my lights at the oncoming traffic so they'll know that there is a speed trap ahead! How messed up is that? Why is it that I'll try to warn perfect strangers who may be speeding that they are about to get snagged, but if someone passes ME, I hope they get get caught and fined? I guess its because I have a heart. "The heart is deceitful above all things, and desperately sick; who can understand it?" Jeremiah (17:9)