Well I can promise you I am "doing it" and I have no idea why you would think I am not.
As I said, I guess you are much better at it than me, and the other anglers who I see having the same issue. Cut kevlar frays badly 100% of the time when I use it. A blob of glue or alternatively heat shrink, stops that fraying. Even if use heat shrink I still normally seal the tag ends of the kevlar with glue and stick them against the shank of the hook before fitting the heat shrink.
A tied off FG knot frays sometimes when I use a Bouz line cutter (see my reply to Brandon above). Brandon's advice about burning it down rather using a cutter is helpful. I have always been a bit nervous about naked flame and braid. A tiny blob of glue at the end of the tie off around the mainline ensures it never frays and I can't see how that would cause any harm?