<<how many airports provide free dropping off time, allbeit for 5 minutes.
I do not see that Liverpool Airport and its owners are wrong here!>>
erm, Manchester allows free drop off.
Go figure.
Being charged to drop off at an airport is just one of those petty inconveniences that totally pi$$es people off.
Do stuff like that to the punters often enough and they just get fed up with the whole experience.
Let's examine the evidence:
MAN pax up
LPL pax down
Even RYR have worked out that you cannot be seen to be nasty to the punter and get away with it for ever.