Are hidden cameras common in dorm rooms in college/university?

I am going to college soon and i am freaking out because of the possibility of hidden cameras, are hidden cameras in dorms a common thing? Should i be

I am going to college soon and i am freaking out because of the possibility of hidden cameras, are hidden cameras in dorms a common thing? Should i be afraid? Are there a lot of sick people who do this??

or:I am going to college soon and i am freaking out because of the possibility of hidden cameras, are hidden cameras in dorms a common thing? Should i be afraid? Are there a lot of sick people who do this??

or:Hidden Cameras is not common in door rooms, this is installed in the strategic arefor security reason.

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