That's enough. In my state, keeping a keg for the deposit IS considered theft. In some places, it might not be illegal. I know that in Michigan, it is illegal to keep a keg for the deposit.
I know people take milk crates that say, "Property of XXX Dairy" without qualms as well. That doesn't mean it's the right thing to do, but if someone chooses to do something like that, let's not talk about it on the internet!
Broken Leg Brewery
Giving beer a leg to stand on since 2006