In a remarkably strange statement at a recent California State Senate hearing over the Protect Our Games Act (AB 1921, California's Stop Killing Games-endorsed bill to compel publishers to provide ways to keep playing discontinued games), a representative of the Entertainment Software Association declared private servers for the likes of Minecraft and Call of Duty "illegal," adding that, so far as the ESA is concerned, "we consider it piracy."
In a statement to PC Gamer, the ESA wrote that, so far as it's concerned, "Private servers infringe on the intellectual property (IP) rights of game publishers. Publishers reserve the right to exercise their rights against them."