I admire the sentiment, Lou. The trouble is that these are not "their" car parks -they are OURS and having them filled with scrap cars doesn't help us.
While it doesn't have the attraction of some of the more aggressive ideas posted here, how about we start with all of us writing to Mr Muirhead, MAN airport MD, or fax to Ringway Handling on 0161 489 3306, (and to any local paper) to ask him to explain why he is extorting money from flight crew by putting this bunch of hyenas in charge of parking.
p.s. If anyone feels like telling Excel how much we like them, their address is PO Box 686, Sheffield, S11 8XR