To DEET or not to DEET? That is the question. Well, according to DEETer, it's an easy answer. Given all the nasty things that mosquitoes and other bugs can cause, from mere discomfort to deadly disease (the most dangerous animal on the planet isn't the crocodile, or the shark, or some poisonous snake... it's the mosquito), when I'm fishing in buggy places from the jungle (Bolivia and Costa Rica) to the tundra (Alaska), to the rivers of Michigan or Maine, I always wear the power repellent.