I'd like to add, just on the off chance that someone who tailgates reads this, that tailgating is not doing you any favors. The sheer degree of attention and reactivity and focus you have to maintain in order to tailgate without fucking hitting the person is so much. You're stressing yourself out. You're making your day worse. You're decreasing your lifespan (both statistically by increasing risk and literally by being stressed the hell out). You're fucking up your brakes. You're wasting gas. You aren't going any faster. If you do hit them, it's 100% legally your fault and you won't get away with it. And to cap it all off, the person ahead of you has a solid chance of just slowing down. Keep a comfortable buffer distance. When they pass something it should take at least two seconds before you pass it. More, if you can help it at higher speeds. The few seconds you might save by tailgating are absolutely not worth it.

Whenever someone tailgates me I start slowing down. Just slower and slower. Not only to piss them off, but also because if some idiot is going to fucking rear-end me, I'd rather it happen at 40mph than 60mph.