i know people who openly use torrents when they're abroad. As long as you remember to turn it off before going back home, it's not your IP that's logged.

if it's to hide what you're downloading from Saudis, because they make patties from journalists or jail activists or behead hundreds of people every year, then maybe you should wait a month to get out to download them

There's an ISP level filter against pornography and North Korea related materials, but VPN uses are tolerated in South Korea as far as I'm concerned.

Based on a quick google search vpns are often blocked in Saudi, but it says they are not illegal.

I think they block specific provider so hosting your own should solve the problem.

I think they are legal in Korea since Mullvad hosts vpns in Korea.

Double check on these things but it seems like you are good to go.

I spend lots of time in south korea and VPNs are fine to use. I primarily use mine for getting around region blocks or for added privacy when on public networks.