Take a dump at my house party. Wanted to cover up. Took some make-up brush cleaner spray. Sprayed it al over the toilet. Didn't say anything.

I went to the toilet later on, sat down and almost fell into the toilet as the seat was all slippery. Never found the perpetrator.

At another house party of mine someone apparently came in eating an apple. When they were halfway done they didn't want it anymore. I have a lot of decorative vases in my house. This person put the half eaten apple in a vase that was about 1 metre from the trash can. They didn't tell me. Around 5 days later I suddenly saw all these fruit flies swarming around the vase and then I discovered the apple. Never found the perpetrator.