Motorcycles in your bus lane

Am trying to open the debate, if there is one, that would we think differently if it was a cyclist involved.

There are a few knobjockeys on motorbikes as there seem to be on bikes.

That's bollocks. You're riding along next to a car door and someone opens it and takes you out. By your logic, it's 90% your fault as you could see someone in the car and could predict they'd open the door?

It's mirror, signal manoeuvre for a reason.

Indeed (also a motorcyclist).