A bag of threats? That doesn’t sound very festive. A bag of treats, on the other hand, would make any holiday season a lot more cheerful. This could be an honest mistake, but if they want to increase their sales, the Metro supermarket chain should probably proofread their signs.
Growing up, kids learn that if they want to receive presents from Santa Claus, they should be on their best behavior. Perhaps this sign isn’t meant to say “bag of treats” at all, and there is no typo here, but this is an actual bag of threats meant as a Christmas gift for the naughty kids.