I believe much of the harassment, particularly in Queensland stems from the previous LNP Government and their draconian VLAD laws...
I remember reports of Ulysses Club members and Vietnam Vets being hassled for simply wearing cut-offs with club badges.
Also motorcycle riders were told they had to report group rides of 3 or more to the police if they didn't want to be "targeted"...
Re "filtering", it's never actually been illegal to filter but that never stopped the police from pulling over riders for doing it.
You couldn't be fined for "filtering" as there was no such law but they would get around it by booking you for not signalling or passing to the left of a vehicle etc.
I used to hear of numerous reports of riders being fined for not having an Australian Standards sticker on the outside of their helmet yet none is actually required if there is an
internal certification label or sticker.
Then there are the over zealous fines for having a camera attached to your helmet...which, is apparently not actually illegal...
I guess I've been pretty lucky as I've never really been "hassled" in years...
It happened fairly often years ago though, especially when I had my side car...
My then wife used to travel in the "chair" without a helmet (which wasn't a requirement back in those days) so Mr Plod would pull us up to have a go over the lack of helmet. It's surprising how many coppers didn't know the road laws...
Then there were the times I got pulled up for not having a rear mudflap level with the rear axle...
Oh, nearly forgot...I once got pulled up for simply riding around the block...
I guess I could also add the so called "random licence checks"... there could be a stream of cars but they'd always pull the lone motorcycle up...
So yes, I do believe some cops do hassle motorcyclists...