If you suspect that someone else is using a hidden camera in a public place without your consent, the first step is to report it to the appropriate authorities. This can include contacting law enforcement, building security, or the management of the public space. They can investigate the situation and determine whether a hidden camera is being used and if it is legal.
It is important to note that if you suspect someone is using a hidden camera in a public place, you should not take matters into your own hands by attempting to remove or disable the camera yourself. This can lead to legal consequences and may not solve the problem. Instead, report the situation to the appropriate authorities and let them handle it.