Free: Contests & Raffles.
One question though. When I was commercial fishing in Bristol Bay we used to have seal bombs on board the boat(M-80s). We'd toss them out at harbor seals approaching our nets while we were picking them. Some what effective... Why doesn't the state of Washington and Oregon allow fishermen with salt water license to purchase a certain number of these explosive devices each season, maybe even requiring a short class in their use so idiots don't blow off a hand, blow up the boat, etc.?