So how do you tell them and make them listen?

[zeocen]

and starts to cross in front of me, its an issue I am ready to evade.

You evaded the issue, nothing happened. Take a breath and carry on your way, welcome to motorcycling.

[superman]

You evaded the issue, nothing happened. Take a breath and carry on your way, welcome to motorcycling.

Evade and punish is so much sweeter though.

[Pseudonym]

Very softly slide up close to the drivers window.
Now, very carefully, make sure your exhaust is as close to the window as possible. This is quite easy on under tail exhausts.
Squeeze in the clutch.
Now, and this is the important bit, rev the tits off it.

Or just rip the mirror off and chuck it at them…
Fuck *555, “they moved over on me and I got such a fright I stuck out my hand and the mirror just came off, it must have been already broken and that’s why they didn’t see me”