How do you handle tailgaters on the road when driving?

I react differently when I am driving alone or with other people as pengers. When I am driving with other pengers, I try to tone it down and just grin and bear it. When I am alone. I hit my brake lights. I also keep a few pebbles in my ash tray. Then I wait until they are practically touching my rear bumper and I let the rocks fly off the back of my car. Shards of weighted granite works best for cracking windshields I found out from an autobody friend of mine.One truck hit me and did nothing to my car and his engine started smoking so bad his truck broke down and I just drove off. The rear vehicle is at fault in collision in my state and that's the law that I checked with my friends at local police stations. Serves the SOB right for tailgating me. How do you handle tailgaters on the road? Got any tricks for payback attacks? I used to keep a rifle on a rack in my truck in Oklahoma but I can't do that in Northeast. When they high beam a double barrel shotgun they tend to slow down a few MPHs after they see that mother load. Well I am also lobbying to get the gun laws changed in my state but that is another post.