If you could 100% get away with shoplifting, definately it's a no-risk deal (theoretical question); would you do it, or not do it because of your internal moral standard?
Does the answer change depending on the size/nature of the business (so for example would you nick from huge faceless corporations but leave local 'struggling to float' businesses alone?)
[Edit] what about if the company was 'evil' and had recently been fined £550m in court for cutting down the rainforest and using child labour. Could you morally justify to yourself the nicking of some of their stuff then?[/edit]