I see that the CAA are using mode S to positively identify cases for prosecution. That should deter further uptake (and use
) somewhat.
I once had what I thought was radio failure in the circuit (turned out to be a headset not fully plugged in) I overflew the tower, got a green flashing light but didn't wait for steady green before landing (couldn't remember the light drill and no transponder) Nothing further was said about the matter by anyone.
Ref the incident in question, without a positive clearance I would have gone around myself but I have some sympathy for the pilot. We all misdial frequencies from time to time.