Per MIDREGS, plebes may not rate any media (to include TV shows, music, movies, the news, etc.) at any time. The only time this restriction is lifted is during the weekends, where plebes are allowed to play video games from noon to midnight on Saturday. Those are the "rules".
Are they enforced? Yes and no. All companies will enforce "no-media-ever", and a few (like two or three) even take away the plebes' earbuds and headphones. But plebes rate media anyway. It's very, very easy to get away with. Turn the music down low, or turn your screen away from the door, or go to the library, or watch your favorite TV shows after 10pm when you can close your door. And during second semester it gets even more relaxed. When I was a plebe I set one of my mouse buttons to automatically mute my music.
Again, it depends on the mentality of the company. In my company, the only people who ever"enforce" anything are the training sergeants, and there's only two of them. Other companies it seems like the entire second-class and joe youngsters are out to get the plebes.
When the upperclassmen catch word of plebes rating media, the entire plebe company is usually punished. So at Blue and Gold some random Sunday, the training sergeant might be like "I found two people rating media this week. You guys are constantly slacking. You are plebes; you dont rate that. You are failing to meet standards so you're put on punishment XYZ" ... And punishment XYZ might be carrying two covers, 1-way p-ways (i.e. you cant turn left), loss of backpack privileges, 24-hour uniforms, or anything else creative. In the long run, it's really silly. The training staff only does it because they're expected to by their own classmates. It's part of the job.
So are you supposed to rate media? No. Will you? Yes. Does anyone care? Usually not. We did it as plebes, so why should we be hypocrites?