Good idea
The 2 best places i know for free fishing have both had it stopped this year one of them has been bought by a bloke who runs a caravan site just down road, and its now gone day ticket (its worth free fishing, but i wouldnt pay to fish it)
And the other, 2 swan's were found dead on the water last year, and instantly the anglers got the blame (even though you get every tom, dick and henry down there, and as it leads onto feilds you get people down there with air riffles and the like )
But if i think of any more i will add them