I think "catching them" is 1 thing, EVEN if those perverts are STUPID enough to do it within South Korea and not use a VPN and get traced via their ISP's IP address, and eventually get caught.

there is still the issue of prosecuting them.. as South Korea's laws against such issues is quite weak.

1stly they may get away with it if its a minor and he post such images of OTHER ppl's gentials or he can claim he obtained those images from other sources else where.. and since he is underaged., his punishment will be the weakest.

2ndly, even if he got caught and isnt a minor, he will claim his ignorance by saying his account got hacked or he used a weak password and someone else logged on, maybe blaming it on his younger brother or someone else.

if not the above, then he can claim 1st time offender and say no "damage was done" other then just "playing a prank" and with a REPENT letter and 1st timer offence., the punishment will be stuper light. that he will be doing it again in weeks,

I think South Korea despite being so INTERNET savvy and having super fast broadband speeds, their punishment for such CYBER Harrasessment is weak.