My goal is to change behavior that puts all of us at risk. Is that not a worthy goal?
To snitch is to secretly tell someone of authority that someone has done something bad. Since I have no idea who the person is, and since half the employees were disobeying their employer and violating state policy, I would not be a snitch. I would be informing the employer that their lack of enforcing the policy is violating state regulations and putting customers, including myself, at risk. If I repeatedly see such action, I will have to take my business to the other big box store half a block away, or online.
First, there is actually no health risk to wearing a mask. Your state provides exceptions. These exceptions most likely apply to machinery in the environment, not individual health risk, even though the language indicates otherwise. Your state also requires written justification. I'll see if my state requires it.
From Ohio's (your state) Department of Health website:
Q: Are there exceptions?
A: Yes. Employers and employees are not required to wear face coverings if it is not advised due to health reasons, against documented industry best practices, prohibited for a specific position by law or regulation, or a violation of a company’s safety policy. A face covering also is not required if an employee is working alone in an enclosed workspace or if there is a practical reason one cannot be worn. If any of these exceptions apply, written justification must be provided upon request.
Surely you don't believe that half the employees are exempt from wearing a mask because of a health concern. And if they were exempt from wearing a mask, why were the masks on but over the chin?, which is completely useless?
Second, there really are not health issues that preclude wearing a mask. It does not restrict oxygen supply or diffusion of carbon dioxide away from the person. If masks cause health issues, what about the health care environment, with its PPE and procedures for taking care of infected patients and in the OR?
Is it snitching to call out systematic violations of state health department policy? Of course not.
It's kind of like wearing your pants around your ankles or putting sunscreen on the bottom of your feet--kind of makes one look like a fool. Only this time, the lives of others are at risk.