A cyclist does have the right to take the lane, at least in California, and sometimes that is the safest thing for them to do on a narrow road where a car may try to pass them unsafely. I try to find alternate routes and not put myself in that situation. Sure, there are rude cyclists just like there are rude car drivers. The difference is that the car will kill the cyclists in a collision between the two and there will hardly be a scratch on the car. I ride very defensively, even when I think I have the right of way. Because there are many car drivers that do have an attitude will not give your life much importance compared to getting wherever they are going a few seconds earlier.