People do what they like and stuff it for everyone else. Years back here in Vic when dredging was legal there was an idiot dredging the Loddon River above Newstead.
He was told not to touch the banks or undercut them. One of the landowners where the river ran through his property had planted poplar tree,s to stop bank erosion on the river bend on his land. The bloke dredging reckoned good gold was under the bank corner and so poisoned the trees and cut in the bank. He was eventually stopped and caught. This bloke too was a high profile well known dredger in those days but was as greedy for gold as they come. I unfortunately knew him, but no longer want to know him, and did meet the landowners neighbour who told me the tale and why he wouldn't let me or anyone else on the property.
Its just like with detecting where I have been told I cannot go back on a property because some other idiot left holes open.
You would be surprised how many so called good blokes in the game who live on the goldfields moonlight, without permission and know the landowner wont give it, and go where they want to. Iv lived on the fields for a few decades now and know very few that don't brake all the rules to get gold. A reason why I have very little to do with the prospectors in central Vic.
:/
