Tourist Season

Why is it that when other animals are in season, you can shoot them, but even when tourists are in season you can't? I always wondered that, and, have often been scolded for trying to hunt them. For some reason, when people leave to go on vacation away from their homes, they tend to leave their brains behind to make room for more souveniers. This causes a single mindedness that no one can like, and often causes many accidents at my place of work. Anyone care to explain this phenomenon? Share any stories about tourists with us or whatnot?