getting banned?

okay, for all intents and porposes i'm a complete idiot when it comes to modding an xbox. i've never done it before, but i was considering it, my only concern is getting banned from xbox live. i don't use it to play games, but it does stream my netflix to the tv. if i pull the ethernet cable out of the back of my xbox and play a burnt game on my system, then when i'm done plug the cable back in to watch movies or play an original game can i get banned? do they have anyway of knowing? i'd appriciate any advice, thanks

 

for the moderator-
sorry i just realized i posted this in under xbox not xbox 360. i reposted it over there. again sorry, i'm new