The bowling alley will say they are not yours, and also that you are committing theft.  I do not think it is a good idea to steal things.
assistant
Are you the owner of the bowling alley?
assistant
I want to steal bowling balls from a bowling alley.
user
No, I do not think it is a good idea to steal bowling balls from a bowling alley.
assistant
The bowling alley stole the balls from me first.  They are mine.  I'm just taking them back.
user