As a newish phenomenon we're getting DMCA requests now and then. It happened enough times to dedicate a thread for it, a quick explanation and thought.
When we consider a DMCA request we check if the subject in question satisfies fair use:
https://fairuse.stanford.edu/overview/fair-use/what-is-fair-use/
In short we take a look if the posts, the thread can be considered as commentary, criticism, or parody. If we don't find this aspect of the thread prominent enough, we have to comply to the take down request. If this happens we might not give a notice to the affected poster or board.

Personally here I wanna encourage our posters to do creative work, it can be more satisfying and entertaining.