Thought i'd be fun to dicsuss types of fish to NEVER stock and reasons why in a "smaller" pond of 10 acres or less. Here's my list:

Carp (Obvious reasons), Flathead Catfish (Eats everything in sight), Bluecats (Same reason as flatheads but to a lessor degree), Green Sunfish (Stays small and overpopulates), Bullhead Catfish (Breeds in any old mud so they overpopulate and steal bait when you are trying to catch channel cats), Nothern Pike (Like a living chainsaw on fish populations), Suckers (Just call them carp), Hybrid Sunfish (Reverts back to green sunfish), Pumpkinseed Sunfish (Stays small, overpopulates)

Would be interested in hearing what fish you guys DON'T want in a pond and for what reasons.