Silver,
While your point should be the 'big issue', we all know it's easier to try to bann something like felt and then feel good about it all.
And I still think that, UDM or not, it would still spread because even if we had a UDM, quite a few foks wouldn't bother with it. Even if you made it the 'law', there would be no cost effective way to enforce it.
I think another issue is that we need to be careful here. The 'science' seems to be trying very hard to single out anglers as the culprits in this issue. If we try to go along and 'admit fault' and then propose a felt bann to try to help or control the problem.....what happens when it doesn't work? We've agreed that it's our fault. We tried, but couldn't stop it. Obviously we can't be trusted to deal with such an issue voluntarily. So, the only option left is to bann our access to the uninfected areas.
Maybe I'm just cynical.
Buddy