"Once you have gone screaming past the queue of cars, they will all have to wait that bit longer as there is now one more vehicle in front of them clogging up the next junction."
You'll find bikes fit into gaps better than cars, ergo less space than if we were sat there in a tintop. We're helping you really :)
"Also, when driving in the opposite direction to the queue, the cars have to slow down as some idiot on a motorbike drives up towards them on the wrong side of the road."
That's pretty rare IME - most bikers don't want to die either and since most drivers on the commute are asleep they tend to keep out of their way (or be ready to avoid you)
"And that's before I even mention the tw*ts who drive up the left side of stationary vehicles (like lorries and buses) making it a pig for anyone coming the other way trying to turn right into a junction"
If you're turning right across traffic, you need to actually open your eyes rather than just assuming nowt's coming. Sounds like your failing.
"And theres the ones on motorways. Slow moving traffic. About to change lanes. Mirror, signal, start to manuver when WOOOOOSH goes a bike from nowhere."
Hate to point it out, but being solid physical objects they don't come from nowhere. Open your damn eyes.
"Motorcycles can be a pest."
Drivers who spend their entire life asleep are even bigger pests.
As always, it basically comes down to jealousy that we can get where we're going while you're trapped. Instead of sitting there fuming, do what I did - join in.