I thoroughly agree. I live in Oxford, UK, well known for being bike-friendly, and it's incredibly rare that cyclists stop at lights here. It's a historic city with narrow streets and restricted visibility in some places. More than once I've gone to pull away from lights and a cyclist has zoomed through a red, forcing me to swerve. I've also encountered the 3-abreast thing and it's infuriating as a driver. Many ignore the fact there's a car behind them and force me to overtake dangerously rather than going to single-file.
Now don't get me wrong, it's frustrating, but I'm also a cyclist. I appreciate Oxford's bike-friendliness. I cycle more than I drive. In fact, I've encountered more of the 3-abreast problem when I'm riding - groups having a chat at a slow speed while I'm trying to get to work. I stop at lights for my own safety while others completely ignore them. I never ride without a helmet. And when I'm on the road, I try to keep as close to the kerb as I can without hitting drains.
It's frustrating, for sure, but the internet breeds hatred from frustration. There's a nice little graphic showing it as a distillation process. Facebook is phenomenally bad at this, by design, since it groups and sorts these kinds of people together. This DFROC group has one advantage though - it could be turned into a private group and then this pool of cess would never need to leak out to the rest of the internet. So long as it stays there, this hatred can continue to fester without hurting anyone, but as we know by now, it always leaks back into real life. The minority may give the majority a bad name, but the boiling hatred from these echo chambers eventually convinces somebody that their feelings are justified and go do something they will regret.
The internet is not a healthy place, but it does have its distant basis in facts.