Don't worry, I am not poisoning anybody. I talked to a few coworkers and they have had the same thing happen to them. Whoever it is, he/she is eating prepackaged food that can't be tampered with. Also the invisible ink thing won't work as the fridge is always full and requires rearranging to fit stuff in it.
Dirty toilets/bathrooms are my worst nightmare. For those that don't flush, I have always wondered if they do that at home. At work there is a mystery pooper that poops on floors. It must be a man since my bf saw a pile of crap in the men's public bathroom. Poop was also found in various lobbies. Practical joke or disturbed person? Can't see it being an employee.
I HATE THE TOILET SITUATION SO SO SO SO SO SO MUCH.
Honestly, we're adults, we (LITERALLY) take care of the shit in our homes, FLUSH YOUR TOILET, IT'S NOT HARD. I actually want to catch someone in the act so I can't punch them out as appropriate punishment. Unless you lost both your arms up to the shoulder blade, I don't want any excuses on that.
As for the food, put moldy food in the lunch box, flip it so you can't see the green fuzz, and have them eat that. Or do the dog food thing.
I swear, it's so hard to find simple and basics of etiquette and manners sometimes. I realize my posts aren't helpful, but I believe in Ashton's solution in that you've missed really basic point of common curtosy and completely forgot about the Golden Rule
-- it's so fucking simple, and if we did it, the world would be 10000000000000x better.