It's like a psychological trauma.
Come up with and create a super-weapon that will only kill tall people. Like sharp blades that move vertically, like in platformer games. These giants won't be able to constantly crouch.
Arandor, you're tall.
Added 6 minutes later
Hey, you tall Arandor!?
И пока в кармане пачка милкиуэйев - значит все не так уж плохо на сегодняшний день