It's possible for someone to do something socially reprehensible and entirely distasteful and to be perfectly within the letter of the law while doing so. The article doesn't emphasize copyright issues or fair use, because that isn't the point. The post is trying to argue that the act is not sustainable and needlessly destructive, in pursuit of something that many people believe has limited value or unproven value, which is true.

Not the case here, but it's also important to keep in mind that laws too, can be unjust and immoral. Much of humanity's progress has involved the abolishment of immoral laws.