I ask them what they play. If they say CoD, then I laugh back and call them a hypocrite. If they say just about any other game, I start to explain the details of competitive battling. If they say they don't play video games, I tell them that they have no idea what they're talking about.
I was once modded for illegal activity because I made a topic asking for advice on nicknaming my Pokemon. 3DS FC: 5043-2277-6391 - THIEF