If anyone wants to do some reading on the science of the felt sole debate, here are some links.
The first link discusses the science of the ban the felt crowd. The following links are the studies in that discussion. As much as I have looked, I could not find a published scientific document about reasons not to ban.
The Science of Felt Soles and Waders
http://stopans.org/Presentations/Sci...geofDidymo.pdf
http://etd.lib.montana.edu/etd/2007/...GatesK0507.pdf
http://www.env.gov.bc.ca/wat/wq/stud...ymo-blooms.pdf
http://www.biosecurity.govt.nz/files...rev-aug-06.pdf
http://www.biosecurity.govt.nz/files...rev-may-07.pdf
MP