A Useful Guide
It’s hard to live with messy people especially if you are a clean freak. While it’s unfair to expect people to live up to your standards of cleanliness, it’s absolutely okay to remind them to at least do the basics. This OP was clearly tired of coming home to dirty dishes all the time.
Instead of yelling at her roommates though, she decided to make a helpful guide complete with illustrations and everything. It may seem like a passive-aggressive act but she’s not wrong. Dirty dishes do attract flies which lead to maggots which lead to more flies and so on. We can only hope that her roommates got the point after looking at this.