> ultimate form of piracy

Nothing was stolen, not even copied, lamest piracy I've heard of.

I take your point, but if the re-implementation looks the same, I would say it’s a form of copying. (Which I don’t think is a problem, I don’t think you should be able to own sequences of numbers.)

What does it mean to look the same? Just look at modern automobiles:

https://pbs.twimg.com/media/ENE01g6X0AA7w5r?format=jpg

Are they copies? Can all these car companies sue each other?