I almost lost it today: WWTOTD?

I'm preparing to turn right onto a busy 5-lane road (full-sized turning median). I look to my left and it looks reasonably clear. In the median (instead of going to the cross walk 50 yards away) is a young guy anywhere from 17-25.

I politely wave for him to cross over so A.) So I don't hit him while I'm turning right and B.) So he can get over safely.

What does he do? He takes his sweet arse time, attempting to hold his pants up (they were mid-thigh) making zero effort to cross the street in a brisk manner. Keep in mind - he had nothing in his hands.

Of course, by casually taking his sweet arse time, an army of vehicles follow and I have to wait a couple of extra minutes before I can finally make the turn.

I'm not implying you have to dash across like Usaine Bolt, but don't be a dolt. DO NOT BE A DOLT. Our society has worked hard throughout the decades developed decency and societal customs - give a thank you wave when someone lets you over in heavy traffic, hold the door open for an elderly person or someone with their hands full, etc. Don't be a fricking brain-dead piece of shite and try and abide them.

Rant over. What would the OT have done?