I'm trying to separate my knowledge of the legal distinction between robbery and burglary from my impression of the meaning of CapK's sign, since commercial establishments are not known for attending to the niceties of the meanings of the signs they create or post. Still, I am left with a perception of a difference between an "anti-robbery" system and an "anti-burglary" system. If shopping for the former, I would expect a system designed to prevent the taking of valuables from my store, its employees and customers, by force (or threat); if shopping for the latter, I would expect a system designed to prevent the taking of valuables from the store by stealth, typically while it is unoccupied.