what I don't get is why no-one's mentioned how much MORE disruption cyclists (say 40 or 50 on a friday evening) would cause if they:
1. cycled 2 abreast in the slow lane at 15kph/10mph
2. leave gaps no larger than a wheel's diameter between you and the cyclists in front of you.
3. stopped for everything - crossings, lights, stop signs
4. occasionally sent a brick of 4 cyclists in the fast(er) lane from the back of the queue to the front not forgetting hand signals, etc.
with a minimum 40 or 50 cyclists that's >100m of road and because you're doing nothing illegal there's diddly ***** they can do about it.
Now that's civil obediance and it get's in the motorist's face (if that's what you want)