a car with an internal combustion engine using a parking space reserved for electric cars is known as The act of ICEing 

The term ‘ICEing’ was first comes in America, when repeated instances of large pick-up trucks parking in Tesla Supercharger bays were seen

Tesla owners being harassed by and getting abuse from truck drivers. and that's why they need separate space.

ICEing specifically refers to petrol- or diesel-powered cars taking electric car charging spots.

some charging points, are now guarded by CCTV cameras to avoid this type of incident's

There is also a rule that anyone who doesn’t charge can expect a fine.

In China, Tesla has introduced floor-locking barriers for to stop this type of incidents

In US also there are some place where EV drivers can release barriers of this parking only using a QR code or third-party app.