how do you ban mods to your game when the mod distribution and SDK are entirely 3rd party?
A) Ban from all servers (even private): https://news.ycombinator.com/item?id=31860168
B) Forcing people to provide personal information to play the game at all: https://news.ycombinator.com/item?id=32142847
Together create effective permabans for anyone Microsoft wants
If you crack the game to not validate through Mojang servers, then it will probably bypass the ban, but I don't know if you'll be able to connect to a 3rd party server which excepts the users to be authenticated