I agree with Dan, the lane is there to be used, pointless quing in one lane exacerbates the problem.
You see this behaviour all the time with human dynamics, we are a social animal so we automatically follow the pack. If a group exists (in this case a queue) we automatically join it, its in our nature. Only a minority of personalities break that dynamic and move away from the group and thereby they set up a new group, which others then feel they can join. I watched a documentary about it years ago and found it fascinating (i love people watching).
One scenario in particular interested me, they ran an interview session with 20 people and 19 participants were actors. The tutor left and the fire alarm went off. The test was to see if the non actor would leave the room if everyone else stayed where they were and said it would be ok. They repeated the experiment a large number of times with differing personalities and in all but a minority the non actor stayed where they were, despite alarms and smoke appearing. It was crazy but we struggle to change our nature.
Anyway i'm going off track on this one but this is simply an example of this, we queue because it is the group behaviour. A minority of others break that group and form their own, building resentment from the first group as they are not playing by the rules. But these rules are artificial, its the rule of the group not the rule of the road. The new group has the right to use that other lane, its just they did so in an idiotic fashion racing up the lane to push in.
The sensible option is to use both lanes at an appropriate speed and filter in an alternating fashion but this rarely happens