Those who made the smart decision to play Halo 4 whilst signed into Xbox LIVE after downloading the shooter through torrents have been/will face a permanent ban from the service.
Microsoft's Live enforcement team is sending emails to players notifying them that they've been permanently suspended from Xbox Live due to "prerelease title play".
In order to play pirated titles on the Xbox 360, the console must be modded. However, playing online or being signed into Xbox LIVE whilst playing a game weeks before its release will inevitably lead to a lifetime ban. "Your Xbox Live privileges will not be reinstated," reads the email.
Over the weekend, Halo 4 leaked onto torrent sites, with Microsoft investigating the situation, as well as removing gameplay videos and general spoiler footage (the game's ending, etc.) from YouTube.
Halo 4 officially launches nationwide on November 6, 2012.