I grew up a sailer, and I still do it on occasion.... I'm also CG certified in navigation as well as boat handling (both power and sail) and I have NEVER heard fo this. If this guy is dumb enough to be sailing in light winds on a boat that is HARD to tack in the first place (light winds making it worse) then I say let him try and ram one of those power boats and we'll see the Laws of Gross Tonnage at work!!! Moron.
By the way, I have registered on that site and will soon be giving this guy a lesson in sailing.