Flash mobs the latest threat this holiday season

The holiday season rings in more than just higher sales for retailers. There's also more shoplifting and lower profit margins than the rest of the year, according to a report released today. Plus, this year, there's an extra surprise -- flash mobs.
Not the dancing, music-playing, watching-a-couple-get-engaged kind of flash mobs. But the kind of flash mobs where a bunch of people all show up at a store at once, pull hats low over their heads, grab everything in sight, and split.
Just last week,