Ok buddy, I'll google the laws of your state and come up with an answer. Check out the last paragraph here The infestation is your issue. The habitatibility of the unit is your issue.
Are civil torts public record in PA? If so the press doesn't need to follow the story.
How would you prove that they are the tenants bedbugs?
Let's say you bring it up and loose, what are the damages potentially. They are capped in a few states. A legal aid lawyer would tear you apart.
You own four properties in a highly regulated industry, that's your business model. Your business model is probably not suing tenants because their unit had bed bugs.