Collective Responsibility?

I suspect they lied.

Because you were interviewing them.

In person, on-record... who wants to say they jump the lights and are fine with it?

In reality, every road user breaks the law at times and this is the norm not the exception. From speeding vehicles, to advance stop lines, to jumping lights, to signalling badly, to hogging a middle lane, to using a mobile device. The list is endless.

The only thing that matters: Was it safe?

If the answer is yes, that's all that matters.

Which means if the motorway is cruising at 90mph, being the one car below 70mph isn't safe. It's safer to break the law.

So long as it's safe... I take the law as guidance. Because frankly going on a green light isn't going to be enough to keep me alive if it wasn't safe. I go when it's safe, the rest is for people to bicker about.

You are introducing sampling bias by going to social media/cycle groups. If you want to find out what people on Facebook cycling groups think then that's fine, if you want to draw conclusions about what people who cycle think then or what a representative cross section of the public think you'll have to find a more random way to find interviewees. You'll probably need more to draw any decent conclusions.

https://en.wikipedia.org/wiki/Selection_bias

http://powerandsamplesize.com/