I regularly see more motorists run red lights in a given day than I have seen cyclists run red lights in a decade. Cycling is sufficiently common in my area to state outright that, proportionally speaking, more motorists run red lights than cyclists.
The same thing can be said for cyclists weaving in and out of traffic, and for good reason: if traffic is moving, it's a good way to kill yourself; if traffic is not moving, there is no need for it. (There is usually enough space on the right to pass. If there isn't enough space on the right to pass, it is unsafe.)
I have seen more motorists barrel the wrong way down a one way street, in reverse, than I have seen cyclists riding down one way streets the wrong way. Proportionally speaking, more cyclists may be breaking the law. In terms of safety, what motorists are doing is far more dangerous.
As for stop signs: other cyclists tend to get the hint when I stop at them on my bike. :) The ones who don't stop tend to do the same as motorists, by doing a "rolling stop". Doing anything less would be a good way to get killed.
So no, I don't agree that cyclists do not follow traffic laws as a general rule. In many cases, motorists are worse. I am not going to pretend that cyclists are better for altruistic reasons. The reality is that cyclists are much more vulnerable than motorists. Cars are made to handle collisions, bikes are not. Motorists pay more attention to cars than bikes, in the most part because other cars are more dangerous to them.