Legea drepturilor de autor - MEME

Buna ziua,

Pobabil ca ati auzit de termenul MEME. Daca nu, aceasta este definitia de pe WIKIPEDIA: "An Internet meme is an idea, style or action which spreads, often as mimicry, from person to person via the Internet, as with imitating the concept.[1] Some notable examples include: replying to a joke by writing, "LOL!" or posting a photo of people in public places lying down planking, or uploading a short video of people singing the Harlem Shake."

As vrea sa stiu cat de ilegal este sa folosesti poza unei persoane publice (luata de pe google images si sa adaugi un text) pentru a crea un MEME. Poate fi considerat pamflet?
In aceeasi idee, daca as avea un site si utilizatorii ar posta astfel de MEME-uri ar fi ilegal?