This question already has an answer here:
I have a problem with internet addiction. (Yes, really.) I have internet access on my cellphone, which I don't abuse, but having internet on my laptop basically makes me completely non-productive.
In the past I fixed this by going into /sbin and doing
rm iw* if*, which makes it impossible to get internet back because to get those files back needs a liveCD and to get a liveCD requires internet; I gave a liveCD copy to a responsible friend in case of emergency.
However, I recently got a new laptop and upgraded to 12.10. I'm having trouble completely disabling the wireless. I tried removing
nt-* but this had no effect - the applet is gone, but the laptop still automatically connects. I tried removing
iw* if* and
/usr/sbin/NetworkManager, but after doing that and rebooting, Xorg mysteriously just blackscreened, so I had to use a liveCD to copy the files back. X now works, but I still have internet access.
All help appreciated :)