Whether it is spread or not spread by fisherman to me doesn't matter. If nothing else it made us more aware of didymo and it's impact.

For me personally is that the thought that it was spread by felt soled boots led to the developement and improvement of rubber non slip soles. Which I like. For years I fished spring creeks (wet grass & mud banks) wearing felt soled boots and cannot begin to count the times I have slipped and almost busted my back side. So I for one am glad that rubber soles came along. I still have a pair of felt soled boots, just in case I ever book a trip in a drift boat. But that is not likely to happen.

Dave