User blog comment:Crazy sam10/Welcome to Nuketown gameplay video released/@comment-10363123-20121101210722/@comment-1854594-20121102204917

Don't see why that would be neccessary. I've played MW3 for a long time owning no dlc and only about a month ago bought the second pack. I've never gotten booted out of a match for not having the right dlc, but it has put me in dlc matches for dlc I own. Not sure what system they are using, but it works and I'm happy with it.