So the friendship ends here, cause you gonna hate me...
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In my country breaking traffic rules when you're sure there will be no punishment, is common. So cars stop by the red light, mostly because the car has a license and there are cameras in intersections.

So many bikers (bicycle and motorcycle) don't care about traffic rules, specially in less crowded streets. Me, i use my common sense when biking, law doesn't care about me, so i don't care about it neither. I try not to bring chaos to the streets, but because bikes are more flexible, you can (in some occasion) manage to cross a red line without risking your life or making a mess in the intersection. Sometimes that there's a traffic jam, i use sidewalks but not like i'm cycling in a street, surely with lower speed so i can handle people, and if it's a crowded side walk, i'll stick to the street.
in most cases it's all the same here, young bikers don't care much about the rules (and also rules don't care about them) also people tend to not care about the cyclist... . People mostly like a cyclist, but not when he/she is on the street.

Final word, in my opinion, that common sense is much more important than the rules. Those rules are meant to manage cars, not bikes.