This isn't even a case of using mirrors, it's a question of being such a uniquely incompetent driver that you can't even stay on the road made for you.
It's a good question how an idiot like him passed his test, if he ever even did.
If the car is legal and so is the driver, then what exactly is the problem here other than you being offended by people going about their lawful business? I mean seriously, what is your issue? Are you jealous? Bitter? Twisted?
Great fun to drive 257bhp Gr Yaris Circuit 4Wd (0 to 60 in 5.5s)
I hope the driver will never forget that crucial sideways glance again...