We've been here before on 'why don't cyclists use cycle paths'. To recap my previous argument, people on bikes generally fall into 2 camps:
1. The person using a bike to get from A to B, likely not to be riding that fast;
2. The person who is riding a bike for sport, who is likely to be riding fast.
I fall firmly into the latter category and I do not use cycle paths unless they mirror a very busy road or have been properly designed as in effect a completely separate lane. Most UK cycle paths are poorly designed and are simply there so the local authority can meet some sort of quota or qualify for extra cash.
Painting a white line on a footpath and calling it a cycle path is acceptable to those in group 1, but for those in group 2 they are dangerous. If I'm doing 20mph - I'd rather be in the road with the cars than on the footpath with dog walkers, pedestrians with ipods who have no idea of what is around them, people reversing out of their drives etc.
I appreciate that may cause some slight delay for others, but I keep to the left and wave people past. And yes, I do stop at red lights. And yes, I don't weave through traffic unless it is completely stationary - i've been knocked off too many times. And yes, if I see some other people on bikes behaving like prats I shout 'It's people like you who give cyclists a bad name.' I've even done that in France (although my spur of the moment attempt at translation had the rest of my mates creased up with laughter).
Ultimately our roads are bordering on the third world in terms of their surface quality, and are getting busier all the time. The utopia of empty roads is something we are never going to have again (unless fuel prices people off the road), so we've just got to get used to journeys taking longer and chill out.
Road rage can end in tragedy - here is a case that's in the news at the moment -
Cyclist admits manslaughter of Hove grocer (From The Argus)
Car driver opened door causing a cyclist to swerve, argument followed, cyclist punched driver, driver fell backward and banged head, driver very sadly dies, cyclist has admitted manslaughter. There are of course, cases the other way around with the cyclist ending up injured or dead.
Unfortunately there are always t**ts out there, be they cyclists, pedestrians, motorcyclists, car drivers etc. Just treat others with the respect that you would expect to receive yourself.