Speaking as a UK-based cyclist, I have to say it doesn't bother me. It's just a manifestation of the well-known phenomenon which sees people posting on blogs, forums and other social media extreme and provocative views that they may hold, but would not express in such terms in circumstances in which they could be held accountable. Unfortunate, but there is nothing to be done about it.

I am more concerned by the mainstream media response, which is along the lines of "if even Bradley Wiggins can get hit, it just goes to show how dangerous cycling is for less expert cyclists", ignoring the fact that in the UK more than twenty million miles is cycled per cycling fatality. So more people are deterred from getting on bikes (or, worse, from letting their kids get on bikes) when actually they are at greater risk of an accident when in their own homes.

As for Jeremy Clarkson, the man is a tit. However, he makes his living from being deliberately offensive, so the best thing to do is ignore him rather than react.