There are a few tiny facts off in the article, but I can understand why they were made – in my original article
here I didn’t mention that each start-up check will keep the game from functioning, and the other, more interesting things only happen if a pirate were clever enough to peel away the earlier checks.
I think some more stuff might’ve been found since I first posted that info a few years ago, but I can’t recall any of it right now. Probably just some more simple checks though. Anyway, if you haven’t seen it already, here’s what happens if a super-duper pirate managed to break through all the anti-piracy protection and played through to the end.
EB’s Anti-Piracy Stuff is Showcased « EarthBound Central