There was an incident at the grocery store where we parked the X3 neatly in its spot. When we came out, there was a contractor van parked so badly next to us, I thought it had scratched our car. Worse, it was so close (literally about 3" apart), that we had to wait until the idiot came out of the store and left before we could even get in and drive out.

I think the biggest offenders of this rule are pickup drivers. Now, I don't mind if someone in their massive, oversized pickup needed two spaces and parked at the back. But it's just plain awful when they decide to park in the middle of an already cramped lot, which not only takes up two spaces width-wise, but also protrudes into the normal traffic flow because the tires and load bed are 3x the size of Texas.

Oh and exotic car drivers do this sometimes too. I saw a Ford GT parked diagonal across two spaces on a busy Sat. morning. I was like "whoever drives this has an ego problem........"