Well, we can not say :
-I don't kill because I will go in jail--That's fear
or
-I will steal a portable CD player because it fit in my pocket, but I don't steal 1 billion $ because the Police don't let me to spend them--That's Logic, but the acts are the same
The main question is about your conscience.
The answer is this :
I don't destroy something that I can not create, you can not give somebody life, so don't take it off.
Don't do something irreparable. If you steal something, you can still put it back.