I too thought it was pretty stupid when I read Dan Bailey's catalog and saw this warning on a number of pages..."some of the fly fishing and fly tying items on this page have been determined...to cause cancer". HA! HA!
I've been around that stuff for 50+ years.
I even periodically stop in Dan Bailey's fly shop and rumage through much of the fly tying items and fishing gear. Those warnings won't keep me away...
And then I was diagnosed with cancer.
Those warnings still crack me up too!
John