Cyrus learned how to rules-lawyer from Helene >:P
The no swimming sign was inspired by a memory from when I went to overnight camp. Our camp's lake was perfectly swim-able (if not incredibly cold) but a lake we'd visit twice a summer had a prominent no swimming sign due to the prevalence of Swimmer's Itch in the water. Good thing there was a Dairy Queen nearby to take everyone's mind off the fact that we couldn't go swimming XD