Cyclists are just like any other large group of people. There are all kinds and stripes of personalities. Most people within any civil group are going to attempt to abide by traditional social etiquette or rules set by society. When you find a renegade misfit, you're instinct should not necessarily be to approach and correct, because you have no idea just how socially estranged this misfit might really be. You have no idea concerning the extent of his mental deficit.

Is he crazy or just misguided?..If he is crazy, then how crazy is he? ...Is he crazy enough to attempt to verbally assault or physically attack me?..Perhaps he's not really crazy...Maybe he just has that crazy look in his eyes as he speeds down the street the wrong way?...But isn't that crazy, to be speeding the wrong way, placing others in danger? ...Why doesn't he consider this fact?...Perhaps he's crazy afterall...

Well that's alright, I'll just ride up beside him anyway and inform him that he's cycling in the WRONG direction and placing others in danger in the process...Perhaps he'll just thank me for informing him of this newly discovered information that he somehow has never heard of before....

NOT!

OP, mind your own business. Your are not a trained psychiatrist, psychologist, or the crazies whisperer...Don't try to correct the obviously wayward misfits, mentally deranged, and criminally insane people of the world. Leave that up to the professionals, the executive branch of government, or at least guys who are bigger than you are, who are game for action.

Peace