The thing is, there are idiot bikers for sure, but there are many many more idiot car drivers. I don't know what the ratio is, and to be honest it doesn't matter when you come across one. Difference is we're so used it its not worth starting a post about all the incidents!
But since you asked
I was riding along yesterday, overtaking a line of cars on the A171. They were doing about 50-55ish, and I did probably overtake them at about 70, very refrained really. This was going swimmingly until someone in a Vectra took offense and decided to swerve out about 3 feet over the center line just as I approached. I'd had too good a day to let it spoil the fun so I just accelerated past and out of the way.
I also came around a bend to find a car sat in the middle of the road. No indicators or anything. They looked lost and I slowed right down rather than overtake. Sure enough, as I got close the bloke just swung it round in a big U-turn. When he was facing me the look of shock in his face was a picture - I think he realised what could have happened. I just shook my head and rode on.
Those are just two obvious examples - there were countless other cars I went past where the drivers were using mobiles, smoking, shouting at the kids in the back, applying makeup, eating lunch whilst driving, performing truck like, half mile long overtakes etc etc etc
So whilst the odd idiot biker (by your definition) may annoy you, nearly clip a wing mirror or whatever, consider what its like to be nearly killed by other road users inattention on every ride!
And I do wish car drivers would stop trying to race. I don't know if its green bikes or what, but recently I've found that more and more cars love to try and accelerate as I overtake. Seriously, its pathetic. I had a guy in an M3 CSL try it yesterday. Annoying, as its quite fast by car standards so I had to actually drop a gear to leave him for dead, and I was trying to have a sensible day! Then, the other week on the Yorkshire TT (Helmsley to Stokesly road) I caught up to an MG TF that was driving enthusiastically, which is fine, but as soon as he saw me he started taking ridiculous risks to try and stay in front. I could see the silhoutte of his wife/girlfriend going mad at him. It made me think later, if he'd crashed could I have been held partly responsible as some people may have seen it as racing, whereas I just wanted to go at my own pace, which was faster than his.
And no, car drivers don't have any appreciation of the capabilities of a bike. You might think you do. You might have been in a fast car and think that compares. It doesn't. Its a whole different world or performance, both in acceleration and braking. I feel far far safer and more stable on a bike at 100mph on a bumpy A road than I do in my car at the 60mph speed limit, and I rarely overtake in my car as it just feels inherently risky unless its on a motorway. On a bike I'm round a car in a couple of seconds and back in my lane. Its all about perception - I'm sure some drivers were thinking I was some sort of maniac biker on my rider yesterday, but apart the dozy car driver incidents, it was a perfectly safe ride.