I think I'm going to steal a parking space.
Is that necessary?
No, I just want to park somewhere different.
Saying you're going to steal it lets me know you're aware that someone else usually parks there. You could be taking the spot from someone who's less fortunate than you.
I don't care, it's too easy to get used to being good and playing by the rules.
I think the simple fact here is you know it's wrong to steal someone's parking spot.