The effect that happens when the particularly obnoxious fanbase of a video game lowers your opinion of the game itself. It is important to remember that a horrible fanbase does not necessarily make a bad game.
"I don't know man, I'm seriously getting sick of hearing about Skyrim. Do I even want to bother with a game that only meme-spewing idiots seem to enjoy?"
"Don't bash the game itself until you play it- you're getting the FF7 effect, dude."