Why does everything good in the world get ruined? Because some people are just dicks. Unless there are active fines for holding up the queue in fast chargers, selfish people will make it worse for everyone.

There are charges, after your car is fully charge if you leave it on the charger for more than 10 minutes you start to be charged for the the extra time you leave you car there.

A multihead charger can move the charge to a different head every few minutes, and can apply quotas or QoS priority.