In general, MOST restaurant Owners, Chefs and Staff, take great pride in running Clean and Safe operations. You don't make Money, Grossing folks out or making People Sick!!!
That said STUFF happens. The highest rated restaurant in York PA, at the Yorktown Hotel had a Check average of $100 per person and DOUBLE that if you had the Wine that went with each course. Bring located in an old city, they had common access Utilities. Mice, Rats and Roaches were unavoidable and cost a fortune in Exterminator fees to just Limit them, forget manage or outright eliminate the problem! They did their best to keep the Pests out of the Kitchen and Especially the Dinning Rooms. But every once in awhile a Critter would find it's way into a Dinning Room and customers would freak out.
The cleanest well managed operations will have Pest control issues from time to time because, Distributors have pests, and Warehouses have pests and Processors have pests and Growers and Farms have pests. You think the Restaurants you go to have Issues! BUDDY, Don't EVER go behind the Swinging Doors at your Favorite GROCERY STORE!!! I worked in the Grocery Biz in my Teens and Managed a Grocery Deli Dept later in life. At least most Restaurant Workers are required to be trained in Sanitation and Food Safety. There ain't No Such Thing for Grocery Workers beyond limited training for managers. Add that most of the Grocery Staff are Kids who could care less about cleaning or sanitation or part time adults whom may have too limited an education to work better paying jobs and you got a breeding ground for Rodents, Insects and Bacteria. Restaurants are the Operating Room at the Mayo Clinic compared to MOST Grocery Chains!!!
There is a reason a Cryovac Packed Pork Loin stays Fresh in your refer for 2-3 weeks but the Grocery Store's Hand Cut Pork Chops are Rotten 2-3 DAYS after you bring them home!
Obviously dirty Restaurants or Fast Food places with employees handle everything from making your Sandwich to taking your Money with the same Gloves On, are to be avoided.
Unless you Grow, Process, Store and Cook your Own Food. Restaurants and Grocery Stores are a reality. Of the places you choose or are forced to go, follow a few Suggestions from a Guy that HAS spent time Behind The Curtain...NEVER eat from Salad Bars, Restaurant or Grocery. Choose food from Full Trays at Buffets. Look to see Steam rising around the pans on the Steam Table or leave. Choose Hot Appetizers and Entrees that Don't contain CHICKEN. Get Friendly with the Deli, Seafood, Meat Managers and workers at your Grocery Store. They will Point you tward the Freshest and best Handled product that day. Buy Producer Vac-packed or Modified Atmosphere Packaged fresh foods. These are the least handled food items. Buy Deli Meats and Cheeses that are On Sale and Commonly eaten! They were brought in for the Sale and Move Fast. Oddball Sale items like Mac & Cheese Loaf is likely on sale to get rid of it. Beyond that, you will make yourself Crazy worrying about what may or may not even be a problem. Hope for the Best and Ignore the Rest!...JJ