Depends in all honesty. On the very unlikely scenario, if they asked permission. Then maybe, which has never happened. Then on the other hand, it is more or less insulting. To take a story behind the author’s back is showing disrespect for their work. On a pirate site however, this is where it becomes a bit more complicated. These are usually done in places where copyright laws are not respected, or there are not any. In a case like this, you have two options. DMCA, or contact the site to have it removed.
I would be fine if my work is elsewhere. However, under two conditions. One, I am asked permission with documentation of the agreement. Just in case they may try to pull something. Two, the works are not used for profit in any way. Since my intention is to have my works out there for free. I do not want anyone to be charged. If these two conditions are met, then I really do not care much. Since, if I decide to expand my work, I can show the documentation to have it posted on another site with ease, rather than going through a hassle to get it done.
Though, if they deliberately copied the story behind the author’s back, and post it elsewhere. It may be showing acknowledgment for the quality of the work. Depending on the type of mirror site used. At the same time however, it is showing disrespect. Since it is taking the work of the author, that person who has put in who knows how much time into making it.
Then there is the possible scenario here that happened to a friend. Someone stole their work, kept the story, but changed the characters actions. Such as sexual identity, or relations. On the off scenario, you may think this is not so bad, it will get the work more views, and they will go to the original author. Wrong, critically wrong. These people supported the knockoff, believed it to be real, and got angry at the original for claiming it is their own last I remember. There was a whole conflict on this a few months back.
So as you can see, there are several scenarios here. Copied with permission is okay, and the best outcome. Since the secondary party will have to agree to the terms to distribute the content. No problem here whatsoever. The next scenario is pirated towards mirror sites. Where it is usually done in places that has no respect, or no copyright laws. This here is better dealt with contacting the site itself, or DMCA. It is honestly better to be on sites that can have some kind of defense against this, even if it is not much.
The third scenario is what I mentioned, they stole the story, kept the bulk of it, but change things like the characters actions. Keeping the names, etc. Which may lead to others believing that work is the fraud’s own, thus giving the original author problems. In two out of the three scenarios, it is absolutely not okay.
Restoration(Book 1)
Restoration: Covenant