Nobody has a right to handle your property. The correct way to have handled this situation, would have been to ask about the bike out loud. After loudly announcing the bike, the next step should have been to place the bike somewhere inside of the store, where it would have been safe.

However, most stores do have a policy of prohibiting the parking of bicycles, indoors. I sometimes violate this rule myself. However, I doubt that anybody would be able to touch my bike, without me witnessing the infraction.

You really shouldn't be that angry, though. It wasn't really respecting the store to park your bike inside. The store really does belong to someone else. Therefore, two wrongs, don't make a right...

- Slim