This is stupid think about the people who came across this site and where like "Oh cool these are awesome hacks I am going to GO OUT AND BUY the game now increasing the popularity of said game and the devs income". I also think its kinda funny because a lot of PC game developers encourage modifications etc. (TES anyone lol)
I also don't think a company like Nintendo would care about the texture editing on Animal crossing. As long as people don't start making penises or something stupid like that Ill bet the texture editing side to hacking is the least of there concern.
Honestly that volleyball game they can't bitch about people making nude characters I mean the game is already ridiculous before hand. (Its also very physics challenged haha)