Yes, plugins.
With a short 15 to 20 mile ranges in them - and some of them like the Chrysler Minivan & BMW eDrive runs on gas all the time with a slight assist from electric motor - they all complete the charge in about two hours and then SIT there occupying the spot for the whole day, when the Leafs and I3s cannot get a slot to charge and some of those owners cannot get home. So they - leaf and i3 owners - end up plugging late in the day after 5 pm after the ICE plugin squatters have left for the day and wait there for two hours charging and get home late in the night. Not happens every day, it all depends on if you can get to office before 8 am.
The utilization of the limited no. of charging stations should be maximized - that should be the goal.
Every minute a charging station sits not-utilized when there are cars needing the charge, is a travesty. So if gas engine is the main propulsion, then just get out of squatting the charging spots. No EV charge station spot for you.
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My biggest worry is, even after instituting idle fees, these ICE plugins, would simply walk over, unplug, but still have their cars sitting there occupying the parking spot, thereby denying the opportunity for others to park and charge.
So I am proposing, 'Kick the ICE plugins out'. This is gathering steam.
I am also proposing, 'Kick the Teslas out' for a different reason.