I am posting on this forum after having a lengthy conversation with microsoft's support services. I currently am unable to have a clan tag in Modern warfare 3, and I get a message every time I enter something in that goes as follows: "Clan name denied due to prohibited text". I also am unable to upload user content in modern warfare 3 and halo: Reach. When I attempt to upload something onto the fileshare in halo: reach i get the following message: "Name is blocked: The name of the creator of this file is not allowed on xbox live". I am able to play on xbox live normally, but without the ability to do the previously mentioned things. I have service request number for the chat session that I had if that is needed. Any help would be gladly accepted.