I'm going to 'ruin' a project because koreans find it offensive
What a terrible plan, what project are you trying to ruin?
I don't even know it's name. As you, an overeducated korean, probably know it relates to the gook myth. It supposedly explains why Korea is so much better than foreigners
Sabotage is wrong though! You should not try to ruin something over such a petty reason.
Trust me, it will be fun.
This sounds like an ignorant and hateful act to commit. No one will be laughing at your racism. Find another group to play a prank on and one that is harmless to you and them so everyone can laugh together.