I live in a place that has what I consider to be the best cycle infrastructures possible. Every road has a cycle lane next to it, usually at least 20ft away from the road, in tree lined purpose built areas, large amounts of grass between the road and the cycle lanes, they form a grid that matches every road in the city. Where they cross the road, there are underpasses or bridges. At no point does a cyclist ever need to be on a road, often you can't even see the roads.

There are still some cyclists (specifically middle aged men in spandex, never women, never dressed normally) who insist on cycling on the road, giving the finger to every passing car, who will loudly tell you to fuck off if you point out that literally next to them, about 20ft off the road, there is a cycle lane. built just for them, so they can cycle safely.

Anyway, this comment is in support of the comment of johnfn. No amount of training or testing will stop the arseholes being arseholes. But it is also to point out that arseholes are not restricted to a particular form of transport.