I remember some years ago we got a 911 call where a shoplifter in a grocery store was confronted by an employee for shoplifting some meat. The shoplifter pulled a box cutter on the "unarmed" meat department employee. The meat department employee summoned his fellow employees for backup and they beat the living **** out of the shoplifter with metal meat trays after using a rolling meat rack to ram the him into a freezer case. The reprobate was transported to the hospital with a few cracked ribs, broken wrist, lacerations to the face and a few missing teeth. He was later arrested, prosecuted, and ordered to pay restitution. This was a case where the "victims" successfully turned the tables using some force multipliers.
Interesting side note *As the watch commander at that time I did a press release on the incident and released it to the press however it never made the news.