I have had 18 gauge wire in my buritto, but figured it was just an accident.
I have worked in restaurants. Some are filthy. Some workers could care less about food handling, especially the restaurants that hire the cheapest help, which is most. It's pretty easy to pass a health inspection. Just keep the meat on the bottom shelf, and keep the coolers at the right temp.
My remedy--don't eat out as much. It's unhealthy. And it's increasingly expensive.
(It's practically impossible to prove food poisoning. If I owned a restaurant, I would hire the best, and put cameras everywhere.)