Or you could prefer good connection.
By the way, the only reason for somebody to not get host is their internet being horribly laggy.
Quote from BWU 02/08/08
We have a variety of different bans ranging from account-level bans from matchmaking to negating players' abilities to host games, when we discover host manipulation attempts or frequent network issues for other players in the game. In addition to the copious amount of statistics taken by Bungie.net from your game, we have pretty detailed information about game conditions and network data as well. Culling through that data has allowed us to continue to make improvements to the system.
Either your host lagged a lot or you were using network manipulation, if you actually are host banned than it's legitimate.
[Edited on 09.03.2010 1:17 PM PDT]