Coffee Prohibition
One of the worst roommates had a coffee prohibition in their shared apartment and refused to budge. The normal person observed this but kept coffee creamer in the refrigerator because they put it in hot chocolate. However, this led to a very dumb confrontation about caffeinated liquids.

The Redditor described: “I laughed in his face and then tried to explain what was and wasn’t coffee… He was naive, humorless, and incredibly uninformed, but all things considered, could have been worse.” Imagine if he spiked his roommate’s dinner with coffee powder.