I do. It's like a webcam. School board members could have the feed running in their offices, on their computers, idly... just because they can. It feels like TV. They don't know the students, aren't watching for anything in particular, they just watch. Some of them could get pretty voyeuristic about it.
People come into their offices. Those people have no connection to the school or the students. It feels even more like TV. They comment on the looks and clothing of the people they see on the cam.
Derogatory remarks about students may be passed.
Screenshots of students can be uploaded to Internet, with derogatory comments.
It's one thing to know that there are security cameras that security or office personnel can watch. That's a limited number of people and they know what their responsibilities are.
But when you start giving access to the feed to a whole bunch of people, it's creepy. Stalkers could be watching. Voyeurs could be watching. People who want to know about the school's layout and security systems, so they can come in and shoot up the place, could be watching.
The hall's public space within the school community and kids should behave accordingly in it. But they have a right to expect that the hall is not public like a street, where you never know who's watching you. The feed from a security camera should stay within the school. At a minimum, the school board members should have to sign a statement of confidentiality saying they'll be responsible for making sure outsiders don't see it without a reason.