this.
hire a south korean lawyer or firm and they'll walk you through the process of filing a case + reporting the incident to the south korean authorities. a lot of them will speak good enough english where you won't even need a translator. you'll get all the personal info you need legitimately, including their names and registered home addresses, at least a good majority of the current steem witnesses.
and looks like witnesses like jayplayco already has a lot of public info on his linkedin & company homepage, which should be enough for you to hire korean lawyers and get started. i can only assume cryptocurrency is a tricky subject, but at least you'll bury them in legal fees. additionally, they'll lose face at their workplace which is super important in south korean culture. the very fact that they're heavily involved in crypto + being sued is enough to affect their careers in a serious way, as well as their personal lives.
@darthknight i tried calling a korean law firm. they wanna talk to you if youre interested. they say they have korean lawyers that speak english. for details you can reach me on discord roundbeargames#8739 or email [email protected]