Ummm, excuse me, but I fucking do obey the law. I stop for stop signs and stop lights. I yield to higher-speed vehicles when safe to do so. I signal turns. Even though I shouldn't have to, I light myself up like a christmas tree with bright flashing lights and reflective material so that you cannot help but notice me (a motorist should be watching for bicyclists just like they watch for cars, but the reality is that they don't, so I give them a helping hand).
Occasionally I may "take a lane", which confuses and sometimes pisses off motorists who think I should always be safely 50 fifty beyond the curb. Sorry, I'm a vehicle with all the rights and responsibilities of any other vehicle. Look up your state traffic code to find this out. It is far safer for me to merge into slow-moving traffic (and therefore be seen) than to cower in the right. I represent no more of an obstruction than if I were a car in front of you, Less so as once traffic starts to move again I will move to the right and give you passing room.
I will *always* take a lane when I have to turn left and there is a left-hand-turn lane. Just like other cars do. And I do it cautiously, safely, but assertively so that it is clear what I intend. It is by far the safest thing to do (for all the above reasons), and presents no more of an incovenience than a car doing the same thing, beyond the driver getting pissed off by the flawed dogma that "bicycles do not belong on the road".
So yes, you've got your free-for-all folks on the road, but that should be a matter of enforcement, to give those bozos a serious reality check. Not only are they endangering themselves and other, but they endanger those of us who take cycling seriously yet have to deal with the road rage inspired by their irresponsible behavior.
So please don't lump us all in the same box. Those of us who follow the rules are the ones you don't notice. But we are there and are in plenty supply.