While this is crappy, it is the default behavior of most large companies when it comes to copyright. As people have described I mistakenly said that copyright must be enforced or it is lost. Agreed I was confusing it with trademark. Despite that, I see many companies treating copyright the same and harassing all copyright infringers with abandon even if it is harmless.

I will also share another story. Some years ago I owned n64.org. I ran a fan website of Nintendo 64 games there. It was quite popular. I was underage ( < 18 ) at the time I bought the domain, and I bought the domain before NOA registered "n64" as a trademark.

NOA threatened to sue me for the domain. I refused as their claim that people would think my fan site was the official Nintendo site was entirely nonsense. In the end they wrote a check to me for like $50 or something equally ridiculous.

Nintendo is not your friend. They don't do a good job taking care of their fans. They will happily sue or threaten you for doing anything they don't happen to like.