A couple comments... First off - what is wrong with eating a 10" fish? Cut the head off, gut em and fry em! Or even better, I guarantee there are many needy families that would love to take those fish off your hands for food. You probably get as much flesh as from a big BG!
The other point I would make is that several years back studies were done on fish brains to determine if they had the receptors to feel pain. 3 different studies showed that fish do not feel pain. While I vote for the "eat em" or give em away solution, fact is - throwing them behind the dam, clubbing them, etc. does not put them in pain.