One thing that is very important, even critical, to keep in mind is that we should never point of other's bad behavior as a way to justify our own lapses in good behavior and judgment.
Everyone on the roads regardless of whether in a motorized vehicle or on a bicycle is required to obey all the laws of the road along with exercising good and proper judgment when encountering others who may not be doing so or when encountering things not specifically addressed by the laws.
For instance, a driver should not use, for instance, a bicyclist running through a red light to justify not passing another bicyclist in the same manner they would on a two-lane road. In other words, the driver should not pass the bicyclist if there is approaching traffic that will not permit the driver to move sufficiently to his left to pass the cyclist with plenty of room between the passenger side of the vehicle and the bicyclist.
The driver should also not pass the bicyclist when approaching the crest of a hill or a curve in the road as the driver will not have the proper sight lines to insure that he or she can safely pass the bicyclist and not run the risk of also hitting oncoming traffic. A driver should never pass a bicyclist to then make a right hand turn in front of the very bicyclist he or she just passed.
Drivers should never try to pass a bicyclist when approaching an intersection regardless of whether there is a Stop sign or traffic lights. The driver could end up creating an accident where better judgment would not have.
We should all remember that we are to maintain control of our vehicles at all times. Therefore, we should always be expecting the unexpected when driving. We should never have the attitude that we are powerless to prevent an accident when someone else does something unexpected and that we should just accept it.
To conclude, we should all show everyone else whether behind the steering wheel of their vehicle or on a bicycle the same respect and courtesy that we want others to show us.