No such thing as smidsy’s IMO, they just really can’t care less about you, either that or they are registered blind.
No ammount of campaigning will change the mind of someone that is prepared to risk killing a cyclist to save him/herself a few seconds of their day.
That and the sheer ammount of dreadful cyclists on the road, you know the ones…no lights in the dark, hop from pavement to path whenever it siuts them, jumping of lights etc etc. I’m affraid we are all lumped in with that lot.
I’d say just be bold, stand your ground, own the road, inspire confidence, make yourself big ride like you have a right to be there.