So what objectively are the criteria for what laws we ignore or adhere to? Clearly not having pedal reflectors is illegal and it potentially has safety implications but many of us break that law routinely. Similarly as pointed out above many of us used LED lights long before they were legal because they were more reliable and visible. Most of us still use lights that are not legal on our bikes - for example sole use of any of the high brightness LED front lights. The evidence seems to be that RLJing is not a particularly dangerous thing to do as a cyclist - its more like a pedestrian crossing the junction than a motor vehicle - and the French trials have not found any increase in accidents from allowing it. So the issue clearly cannot be a legal imperative to comply (vide pedal reflectors and lights) and it cannot be a safety imperative. So on exactly what grounds should we not do it? The only thing seems to be it might annoy someone but then so does wearing lycra and not having a bell it would seem.
I don't think, objectively, there's an answer to that.
Clearly RLJ has the
potential to be more dangerous than filtering into an ASZ or not having pedal reflectors, but whether it actually is dangerous will depend on the situation. It also appears to put other people in danger rather than just the cyclist (in practise, it's overwhelmingly only the cyclist in danger), unlike the pedal reflector example.
I guess it's because it's more obviously illegal, than the other examples. I doubt whether anyone who is otherwise well lit has ever been fined for not having pedal reflectors, and I also doubt whether many people even know it's illegal. Plus it's not as obvious when someone is not complying. Whereas, when a cyclist goes through a red light, everyone around sees it, and it looks dangerous, whether or not it is.
I honestly don't know what the answer is, except my preferred approach is to comply with traffic laws, except when doing so will actually endanger me (filtering into ASZ for example). So I don't actually have much of a problem with someone going over the stop line, but not into the junction, to create their own ASZ (although I would personally hold back a few cars).
Sorry, I'm rambling, but it's clearly not as black and white as "it's illegal, therefore it's wrong"