Look at it this way.
If you part taking two spots, you give someone a chance to dislike you for doing so, thus you're more likely to get keyed/damaged by someone who thinks you're an idiot when you park.
I park in spots that are protected on one side by a curb, and park as close to the curb as possible.
Here's an example...I'm not taking up two spots, and I have plenty of room on my drivers side to get out. In this case I wasn't worried because I knew what was going to park next to me...but it's a habit now.
