Late Show producer Eric Stangel tweeted a picture of a "Boston Massacre" t-shirt in a Nike Outlet store, and employees said they were removing them.

Try to guess the Internet reaction to director Jonathan Bucari trying to make a TV movie about the tragedy in Newtown, Connecticut.

If you’re unfamiliar with the 140-character world of Twitter, then you’re probably unaware that there are thousands of celebrity parody accounts currently providing cheap laughs for their followers.