They ain't jokin'
'You must pay for a permit but we do not take any responsibility for the Arsenal supporters who will park down your road because they're too lazy to walk. Therefore you must monitor the times you leave your parking space, as so Highbury-bound arsehole will have nabbed it by the time you get back from the shops.'

My parking permit actually says that.
(amerella, Wed 20 Mar 2002, 10:16, archived)