The sad thing is an alarm system does virtually nothing. You can see all these smash and grab that happen in well lit, alarmed, and even open, businesses. Its a deterrent for the idiot thieves but will likely do nothing for anyone who really wants in.
Its a fear for anyone, and moreso for those of us who rely on the items they'd steal for our livelihood. Even with insurance, the inconvenience and replacement would likely bankrupt many small businesses.