Thomas Shey
Legend
So are D&D 5e home games that use IPs that aren't officially adapted to the 5e ruleset (Star Wars, Avatar: the Last Airbender, Marvel Comics, etc.) illegal?!
I mean, you realise how ridiculous that sounds, right?
They're probably technically correct. IP law is pretty dumb, honestly.
What it ignores is the practical reality which is 1. WOTC finds out, 2. WOTC cares, 3. WOTC takes you to court (or even issues a C&D) and 4. A judge doesn't tell them to quit being ridiculous.
I can tell you why they're saying this: Copyright protects commercial use and no company was mad enough to try and sue people when they scribbled Spider-Man on their drawing practice notebook. People can and do use IPs for their homegames without permission from that IP all the time, and the idea that IP law would somehow extend into people's private creations is just as ridiculous as it is unenforceable.
Noncommercial violations can and have been successfully sued. Its just a dumb usage beyond any function copyright is intended to cover and even the courts usually show that. But as usual there's some "power to indict is the power to destroy" elements present. But I've never heard a reference of it being even attempted, let alone successfully in an entirely private situation.