I had a hunch it wouldn't be long before Valve patched things up. From
yesterday's post you can see some affects of having the ability to use cheats in 360 versions of
Left 4 Dead. Kotaku
received confirmation that the dedicated servers have now been patched to prevent this and they are working towards an update for the client for those that play on listen servers or system link. Glad to see Valve is on top of things to fix this quickly