Oh? Please tell me how a bunch of people doing the same speed creates a dangerous situation.
For the record I agree unless you're overtaking don't be in the lane.
Oh, that's an easy one.
When people who speed can't pass they get irrationally angry and start to do dangerous things, like tailgating, swerving, and suddenly accelerating/braking.
So you see, it's really your fault for making them SO DANGED ANGRY because they can't speed and pass people at that particular instant.