People can be such... You know what I want to say!

[Y33TREKker]

You see the problem here is that you assumed the camry driver didn't purposely parked like that.

Actually, I didn't assume anything. Just because I said that you had assumed one thing doesn't automatically mean that I assumed the opposite.

But in the real world the evidence suggest that the camry driver parked the way he/she did because the driver wanted to have enough space to get in/outter the car with no problem & at the same time expressing his careless concern about how the driver parked next to him should get in/out.

I agree that is one possible explanation (*), but regardless of whether it's accurate or not, it was still a mistake (purposeful or not), and not one that would warrant you keying the persons' car. But that's just my opinion. You're free to do what you want of course, as long as you are willing to accept the possible consequences.

(*) PS: Here's another possible explanation. The Camry driver got a call that a family member who worked near that parking garage had been involved in an accident/emergency, etc. and the Camry driver was rushing to the scene to be with that family member. Granted that's an extreme possibilty, but if it were you in that case rushing to the saide of one of your family members, would you be paying close attention to the lines on a parking spot in that situation? And say that were the case, on top of your family members' trouble, you then come back to your car to go home and find that someone has keyed your car because you parked too close to them? Perspective.