What is the most unbearable thing in the piano room?

I want to start with the process of practicing the piano. Background: Before the new piano room building was completed, all the piano rooms in our department were public. The orchestra has its own independent practice room. The old piano room I mentioned below is used by all majors (whether it is piano department, composition department, music teaching department, vocal music department, etc.) (there is no meaning of judging from top to bottom, please sing standard A and play standard rhapsody in blue to compete). Some students will go to the piano room, but instead of practicing, they will chat with the concierge. After talking about mature people, go back to the piano room and call the number directly. I guess I found a new piano room with accurate pitch by accident, so I wanted to go later, but it was quite annoying. Then you occupy the piano room and don't practice. You cut watermelons in it for a while, keep radishes for a while, take selfies when you are tired, and make phone calls for a while. From entering the piano room to coming out for four or five hours, all the snacks were eaten, and even the piano cover was not opened. There was a crowd waiting in the piano room on the first floor. Another special requirement is a piano room with two pianos. As a result, the two of them brought their own partners to play with each other. Piano rooms with two pianos are rare. Please open an hourly room, not so cold. Embroidering a gold plaque on the left piano room and pulling two on the right really doesn't affect the mood? In the piano room elevator, it is annoying to post the QR code of your own beauty Taobao shop. Sticking it to the digital button on the floor is even more annoying. It was pasted and torn, but the button was sticky and annoying (with an angry face). Not to mention those who smoke in the elevator, this bad behavior has nothing to do with the piano room. When I entered the piano room, I found that because the previous one had the window open (which was really harmful to the piano itself), or there were four or five hungry mosquitoes or something, it rained heavily all night and the room was full of water. The mirror used to practice vocal music was smashed or changed with liquid lipstick or something that said "XX I love you". There are also poems written with correction fluid on the piano, which are directly carved with sharp tools. (When practicing vocal music, they suddenly pinched each other and sang the same song, rising wildly until someone went to comment. A heard that B practiced the piano incorrectly, so he played the tune that B was practicing fluently (seriously, playing 740 won't show off in an ostentatious manner.