Jossy and his friends sound like Rita Cosby and her sources.
Here's what I found other surfers saying about using duct tape:
Windsurfers regularly keep a roll or rolls of duct-tape handy. Not the cheapo stuff that people have noticed isn't very sticky, but the really good sticky kind.
I've always brought a roll of duct-tape along on my windsurfing vacations.
Duct Tape is used to help with blisters on hands and feet, but also used frequently to temporarily patch small rips in sails or dings in fibre-glass boards.
and
...I've seen others use duct tape on hands, fingers and feet. Sometimes the blister just occurs, and the duct tape is used just to add a layer of protection 'during' the activity.
I have used duct tape on the achilles tendon portion of my feet, when wearing booties while sailing has begun to chafe my heel area.
I'm certainly not suggesting 'duct-tape' as the medicinal solution to blisters. It is though, most definitly used for many short-term solutions for sailing issues from blisters, to sail rips, to you name it.
For as long as I've sailed ( since 1979 ) the slogan 'Duct-tape...the sailors best friend' has been around.
Long hair, windy conditions, sticky duct tape...easy to see how hair could wind up on the tape.