Timmey said:
As funny as this is, its in reference to 360, not xbox 1.
source: https://twitter.com/xboxsupport1/status/345775684045660160
Except the original question was clearly about XBone games.
So, while it isn't a completely clear answer and it is indeed correct information, you can apparently lose access to XBone games that are tied to your account if you get banned (probably referring to digital downloads). When asked if the same also applies to disc-based games, Xbox Support can't provide an answer and links to info on sharing games on the XBone, indicating they knew fully well what console the questions were about. I don't know why'd they'd later bring up the 360. Maybe genuine confusion? Maybe they're dodging the question and doing damage control?
Regardless, "What happens to my XBone library should my account get taken away?" is yet another question about the console that has yet to be fully answered.
While it is normal for a console manufacturer to get swamped with questions whenever they show off a new system, the last few days have been an absolute PR disaster for Microsoft. People are worried and clamoring for information and Microsoft seems unable or unwilling to provide clarity in a time when they really should.