If you think about it, having a college roommate is a lot like getting married. You and your roommate are stuck with each other -- for better or worse, in sickness and in health, until summer vacation parts you.
The transition from residing in a nice spacious bedroom to living in a limited-spaced dorm can be quite tricky. You have to consider your roommate and their belongings, along with items that are simply prohibited in a college dorm for safety reasons.
Custodial staff are often burdened with extraneous, unnecessary tasks. Their jobs are difficult and under appreciated as it is. We don't need to add to that with insensitivity and stupid antics that leave messes in our wake.