To interject fact into this otherwise fascinating exercise in fantasy, LSC was a creation of Chicago John. Referring, I think, to anyone who disagreed with his point of view.
I, on the other hand classify those who disagree with me as simply wrong. AS that includes most everyone, it makes life easier.
I think the "duct" and "duck" tape refers to two different products. The silvery kind is, (I think) metallic and works on HVAC duct work, while the other kind is fabric based and comes in lovely designer colors and doesn't work on ducts at all. It is invaluable at a gig for dealing with pesky tangles of patch cords and obnoxious hecklers.
Sadly, there is no such thing as virtual duct tape (second meaning)