Anybody who has tried to play 1 vs 100 today in the UK may have faced a few problems. Some cannot join a game anymore and others keep experiencing a system crash during advertisements.
The cause for this is because the games servers crashed out and failed which would assume the amount of people trying to access the game to play it all at the same time was to much for the servers to amount for forcing them to freeze up and deny access for people.
I'm not sure if this is apparent for everybody but it does seem to affected most of the UK community as many people over on the Xbox forums are saying that they cannot connect to the 1 vs 100 game anymore since it froze half way through a stat break or advert. People can only hope Microsoft sort this problem out as soon as possible.