Not exactly a template defence, but it does pay to get and check the pics. You would have thought the venerable ParkingEye might have picked this up on one of their 19 stringent checks they carry out. (Note: This one was picked up by a DVLA Ranger - GIAA - so they do check)
If you want to know the sorts of howlers that ParkingEye and others make, then ask the DVLA for a copy of the latest GIAA audits.
No blue badge?