Is this a thing now?

OP says someone was blocked in for a minute… then says it was a few seconds, which was it?

And blocked in, how? Some twat who sticks the hazards on and dumps their car anywhere 'just for a minute' (but it never is) ?

Got stuck this morning due to a thicko, I was waiting to turn right into a petrol station which has KEEP CLEAR painted in a box on the road outside its entrance, thicko drives right onto the KEEP CLEAR and stops. Nobody could then move because the queue behind me was blocking a car on thicko's side of the road from turning right, meaning they couldn't move either.

Yellow boxes and KEEP CLEAR are there for a reason. Add double yellow lines onto that list too

Think it has always existed, to some degree.

Anyone who has cycled for any extended amount of time will be familiar with this behaviour as some drivers want to demonstrate just how powerful/fast their vehicle is when they can pass the cyclist they had to wait for for a couple seconds.

Stupid parking which leaves barely a gap to get through is annoying and needless. Very common in my estate and given the average age around here, it's only a matter of time until an ambulance on an emergency call is blocked