http://www.newser.com/story/171132/jim-cramer-hints-snapchat-helps-insider-trading.html
Jim Cramer tells the Feds about Snapchat:
“My daughter and I Snapchat. OK, it disappears in three seconds,” Cramer said. “Can the bad guys Snapchat, ‘Go buy Leap Wireless’ at 3:45 on Friday and get away with it, because you don’t have the technology to stop it?”
If anyone is using snapchat for insider trading that is extremely careless, I don't have time to find the article but there was a post here on HN about how to recover all the old snapchat images on the phone.