I'm not going to let them overtake me on the road
Why aren't you being considerate?
I think they might be after me!
Even if you're suspicious of their intentions, it's still important you drive safe. Being defensive while driving makes you and those around you safer. Just let them pass and hopefully they will leave you alone.
I don't care about them. They can catch up to me if they want to, but I won't let them by. Screw them.
Especially if you are scared, you should slow down and drive carefully. Don't play games with people on the road or you may cause an accident.