There Is An Easy Way To Kill A Person With A Riot Shield On Modern Warfare 2 On Multiplayer. While They Have Their Riot Shield Up And Their Not Backed Up Against A Wall Throw A Flash Bang At Them And Wait For Them To Be Stunned, Then Quickly Run Behind Them And Knife Them, Thats One Of The Ways You Can Kill Them, The Other Way Is To Shoot A Rocket And Try To Make It Hit Right Behind Them.