For me, I want to avoid accidents.
I try to keep a safe distance between myself and the vehicle in front of me.
If I have a tailgater behind me, I need to increase the distance in front of me so that I have plenty of braking distance in front so I can avoid having to jam on the brakes and risk getting rear ended by the tailgater.
This safety space doesn't always work out as cars will/do change into my safety space in front of me.
The tailgater won't stay back there long....
They will figure it out and go around. Well, maybe....
I just try to enjoy the ride.