Joined a random game of search and destroy, 1 teammate put down 4-5 riot shield.....am i missing something or is he cheating?
Its one of the most simplest glitch to do. I've personally never done it in any "Multiplayer" games. It's against the code of conduct to post things about it, so ill leave it up to you to figure it out.
Probably why you haven't gotten any replies either. You should have just reported him, it is a glitch.