Small issue to potentially give up privacy for. This is rather a job for the police and sensibilisation campaigns.

Also think of this way: if you both tailgate, and you have to brake, you will be hitting both the one in front of you, and getting hit in the back. If you don't tailgate and only get tailgated, you will only get hit in the back. (And have a way better defence for your insurance company.)

(PS I'm going to assume this is tailgating on the highway ?)