"NOT HURTING OTHERS is lesson #1. It comes before reading, writing, counting or anything else."

Antwand Pearman, CEO of gaming and health company Gamer Fit Nation, said he doesn't believe games are to blame. But he started a movement, including a hashtag on Twitter, urging people to give up playing first-person shooter games on Friday, Dec. 21, as a show of sympathy and understanding for the Newtown victims.

"It's not to say that video games are to blame. It's more to show that we as gamers give a damn," Pearman said. "Video games are more so a reflection of real life. Gaming is an outlet, just like movies and music."

CNN commenter Sean S. said he hopes people will look deeper for answers. He said parents have the most responsibility to teach their kids, especially since they are often the ones buying the games and they cost so much.

"People blame the video games because it is easier than blaming themselves, but the fact is millions of kids around this country and around the world play the same violent and destructive video games, and yet only a very select few have made the choice to take that violence and killing from the game and bring it into real life," he said.