A red light in the hotel, at the door of the bathroom, flashes when people move, and it doesn't light anywhere in the room. What is this? Could it be a camera?

Hotel rooms or bathrooms don't have red lights, usually white lights, probably cameras. I suggest you pay attention to protecting your privacy. If there is a big doubt, we can also choose to call the police and let the police handle the problem. In short, we should be vigilant when we go out now, so that the plot of unscrupulous criminals can not succeed, because criminals are quite cunning now, installing cameras in rooms or bathrooms to take pictures of others taking a bath! Changing clothes or something, and then using this video to make money, is to die, everyone must be careful.