this was never done and was outside of dewrito's capability anyway
the same type of tool (XBC, Kai, etc) used to play Halo 2 LAN over the internet was also not called circumventing Live nor ever called piracy. Nor was using it to play 360 games' LAN modes online called piracy, even though you had to circumvent Microsoft's LAN ping check to do it.
you could openly download the client directly from microsoft with no extra software.
The software was for modifying and playing private games, not for piracy, was never capable of piracy, and does not give you paid anything for free.
I made the PSO2 comparison for a reason, as it matches this scenario pretty closely (the full client is given to you for free).
Halo 2 is a poor comparison, because the game was never given to you under the stipulation that it be used on Xbox Live. You bought it outright, and they got paid when you did. XLink Kai simply meant that you didn't use their other service. This isn't the case with Halo Online... the service and the game are one, it doesn't have a "LAN" mode. Removing one to freely play the other is stealing the others revenue stream directly. I don't care what bits you decide to play, or ignore in the game.. the game itself should not be playable in any fashion when you're not connected to their server, and playing as part of their population/ecosystem.
In any case, the previous thread regarding this ended with a modbot post making NeoGAF's standing on the subject pretty clear:
ModBot said:This seems like a good time to end this thread. Yes, circumventing a game's revenue stream is piracy. No, that is not something to be encouraged.