JohnnyBike - You're slightly wrong on burglary. Burglary is entering a property as a trespasser with intention to commit theft, rape or murder. The property does not need to be locked, the person just needs to entering property they're not entitled legally to enter. Big stores will issue 'trespass orders' to persistent shop-lifters, making their entry into their stores illegal. If the store can then prove the person was in the store, against a trespass order, with intention to steal, the person can be criminally prosecuted for burglary, which carries a heftier sentence than straight theft (shop lifting).