It's one thing to want to do something, another to be able to do it, and completely different to actually do it.

The UK didn't join EU through a referendum (there was one whether to stay in EC which was 60% for), and they can't leave it through one. The only way to leave is if their elected officials take the appropriate steps, and suddenly they are not in a hurry to do so. In fact they are now apparently looking for ways around the process because of realization that following it leaves UK in a comparatively weak negotiating position.

All this unpreparedness does not instill confidence and that is not a good thing.

As far as protests, that's just normal part of democracy and certainly beats resorting to violence which I keep reading warnings and treats that it's coming. I am pretty sure that there is no universal age of wisdom, as plenty of grown and old people have not gotten much of it, but anybody who pays a little bit of attention ought to know that those at the top are generally doing alright no matter what happens, so 'just burning it all' is pretty much cutting off one's nose to spite one's face.