how legal is this?

Not (depending on where you are). However, in my opinion it is absolutely ethical.

Do you need to hide in complicated ways?

Depends on where you are. For most people, yes you need to hide it, but it needn't be complicated. You can just bind your torrent client to a (trustworthy) VPN.

That said, these things always carry some risk, and that's yours to take.

Mirror a couple TB of anna's archive

Yeah. It was bad in coffee and worse on its own. That's coming from someone who really likes oat milk

I also tried their matcha flavoured oat milk just for shits and giggles. Unsurprisingly, it was unimpressive. It tasted strangely similar to soy milk.

On this page:

The main problem with old computers is the amount of RAM available (they were sold in a era where RAM chips were expensive)

:')