Help! People are eating local bass!

[islandflyfisher]

I called FWC (Florida Wild Life Commission), and they all got ticketed for not having a license. I am sick of seeing the fish populations getting destroyed because people clean them out in a few trips. They yelled at my friend for releasing a fish.
In a local canal, I had caught some the biggest bass of my life and many other nice ones. This canal connects to a chain of canals and a lake that form a sort of square. I have caught all of my four pound and up peacock, but one in this system.
These guys used to come frequently for a period of time, and we rarely saw any sizable fish in this time. They hadn't come for a while untill last week, and we were finally starting to get two to three pounders. My friend even lost a five pounder.
Any ideas on what to do? They say that they are coming back tommorrow (I guess they figured out who called).

Should I put up some kind of sign? What would you guys do?