You clip 2 drawa(sic) together, metal on metal. Brilliant.
to be fair, I have seen this alot. . . in the USA. . . foreigners in Korea. . .many nationalities everywhere have done this. Just because you see a Korean doing something unsafe, it's a leap to
. This is a great forum to ask for ideas and point out better and worse ways to do things, but watch the generalizations-- well, lets keep KOTR respectful! You say this is the first time you've seen this, and yet call it a "habit" . . . hmmm. . . be fair! Maybe the guy was sketched. . . pushing his limit and he did the quickest and easiest thing. . . who hasn't?
You are a teacher. When you see a student do something you disapprove of, what do you do?
(I taught and climbed for years in the US. . . haven't seen anything here that I didn't see in the US. . . actually. . . saw a lot worse at home. . . at the places you've climbed!
That said, I agree that this is a potentially dangerous way to extend a draw (I wouldn't say metal on metal
is bad, per se, because obviously I clip draws and slings into the wires on nuts when I trad climb and I clip metal bolt hangers with my biners when I sport climb. . . I've cliped metal pitons aid climbing and metal screws ice climbing!. . . quite often-- as in these cases-- it's the case that metal is best on metal, because metal can slice through webbing, cord, rope. . .aish!) When I need to extend a draw (to prevent rope drag, etc) I pretty much do what Eric suggests, but since I'm usually on the go, I don't bother to remove the extra biner (don't need to carry the extra weight anyway!) . . . Both biners should fit through at least one loop. . . on my Trango draws they even fit in the small end. . .