So I'm going to say something controversial because I have first hand experience but I find motorcyclists absolutely abhorent of the rules of the road, and to be honest have no excuse....
In my experience anyway:
I think motorcyclists should be applauded on passing their tests. Bit like the "knowledge" the taxi drivers go through, we all know in our own cars we have blind spots. In my experience if you want to find a biker, even if you never saw one coming up -check your blind spot, they have an almost universal "fetish" of naturally breeding in this exact area, no matter what car, van, bus anything. Bit like "clingons off the starboard bow", but cloaked until it's too late. Unfortunately if you ever communicate this to any biker I have ever met it's met with agression about how they are in better control
Overtaking: I have seen far more bikers take risks and cause usual traffic to react. Just because THEY can accelerate and squeeze into an unconceivable gap, there's no consideration for the main road users
Filtering: WTF and why do I have to acept so may bikers clipping and scrtching my mirrors in static traffic becaue the exercise their right in a 30" gap to push a 29" bike through, then when it gets in to the front of the que to ignore the lane discipline at the junction, it's OK for a bike to cut across 2 lanes of traffic because the cars can apparently emergency stop quicker than the bike can
Front licence plates (bikers get off). I don't care for speed cameras, particularly average cameras if they are not employed correctly because they're not set right. A9 a case in hand. No front plates on bikes, I would have loved to have been able to take a pic of the biker once who held the entire road back at below 30 in the 60 zone, nobody could get past and he weaved in and out to ensure it, then I would guess he hit 120mph before we even lost sight of him. But we caught him again doing 30 in a 60 later and nobody could get passed again. I kid you not, he stood up twice "hands free" on passing average speed cameras we were held him back by and each time gave a one finger salute like a selfie, before racing off as fast as he could again.
Truckers I am not convinced. I started my HGV theory and already worked for a company processing drivers returns, temperatures for food and some tachos, but the industry wasn't promising anything before something else came up.
However, I'm sick of being "chased" by HGV's. There was a case a cpl of years ago where I had to transport a cast iron pump in our pick-up (a commercial vehicle so I always set by the rules). I was totally bullied by an HGV behid me who couldn't keep to the speed limit (I drove bang-on to the limit as it was safe to do so). This big truck behind me just couldn't do it, at one point it wouldn't surprise me if he was less than 6" behined me, then stamped on the brakes. Then came back up again. Then the same again, agin, again. I was actually on cruise control. +/- 1mph'ish of the law for both of us for a commercial vehicle, I wasn't holding anybody back apart from him. When I went down the slip after about 20 mins that boy was not happy, he almost clipped my back bumper passing, and we did NOTHING wrong yet some HGV driver probably on his blog etc. Horns were pressed and fingers raised!!!!
Grr...
Meanwhile my 465 buss passed me as usual at the crossing today -which means I can't make it running across to the stop in time! PERFECT scenario (I never had the chance to take a pic), the bus driver actually had a smart phone stuck on his side window -as he cruised to a stop he was tapping away, no bother, as he pulled away, no disruption to his multi-talents!
...For anyone who has not experienced buses in France, I imagine that there is a guaranteed union supply of brake disks and clutches. It's trange, when someone comes on or off with a wheelchair they are amazingly co-operative (as they should), if you're not in that category it's like I imagine like like launching an Ariene rocket without securing anything, then wathing your shopping slide out behind and after is someone elses problem but the G force is always too much to actually get there to recover.