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.