I think the social contract is still such that your phone’s camera should not be used in the bathroom.

I’ve seen stories of people banned from gyms for taking selfies in the locker room as people were walking by.

Yeah sometimes the younger gym bros are in the dressing room at my gym taking pictures of themselves in the mirror. If they accidentally include my ~60 year old ass cheeks in the background, IDGAF. Probably ruins the photo for them.

You should care, if they post it to socials then you are further tracked and online in at least one more sketchy database, and half naked as well.