Park over the white line so you take up two spaces.It might p**s the others off but its a dog eat dog world and nobody seem's to give a stuff about other peoples property.
This really ****es me off. Whenever I see someone who has done this I make sure I park right next to them, about 2 inches away so they have to enter via passenger seat.
If you are that fussed about people parking next to you then order online and delivey is usually a couple quid-about the same in cost of petrol/diesel to get there and back