According a report on the mostly positive web site Care2, "animal activists" (hacktivist?) have hacked a dog fighting game that was removed from the Android Marketplace in April of this year for being offensive.
The game, simply called "Dog Wars," sparked outrage among animal activists earlier this year and a public outcry led to Google removing the game from the Android Marketplace in April. The game was still being made available on third-party sites, which is why hackers targeted the game.
The hacked version of the game contains a trojan that sends out a text to all the contacts in the player’s phone with the message: "I take pleasure in hurting small animals, just thought you should know that."
Care2 offers some commentary, which mostly chastises those responsible. You can read the whole thing at Care2.