Learning (and much more so, teaching) trappy openings is the wrong (very wrong!) way to chess development.
Quoting GM and FIDE Senior Trainer Adrian Mikhalchisin:
"Usually, quasi-trainers know themselves one and a half openings and teach every single student in the same way. Another typical mistake is to teach trappy openings. And sometimes well-known trainers also make different mistakes; for instance in one certain country all juniors play "The French Defence"!
After seeing this game, I am feeling deep sympathies for Alekh. Poor GM got creamed like a patzer. Never saw it coming.
p.s. I didn't know Alekh ever lost a game in 20 moves (notice that in this game black is clearly in lost position by move 20 although he dragged for a while).