Kxmode wrote on Sep 19, 2016, 19:00:

Muscular Beaver wrote on Sep 19, 2016, 06:35:

jdreyer wrote on Sep 19, 2016, 03:15:
I don't think Valve is being nefarious as much as looking the other way.
"Oh! You cheated! This copy of the game is banned!" *wink-wink, nudge-nudge*

If they really wanted to put a stop to this crap instead of reaping tens of millions of dollars from repeat buyers that get banned multiple times, they could IP ban or MAC address ban people.

MAC addresses can be changed easily, permanent IP addresses not so easily, but its possible, too. Especially since most people have a dynamic one anyway, it could hit the wrong people.

In Section 3, Subsection A of the Steam Subscriber Agreement, Valve makes it abundantly clear that using any method to change an IP is grounds for account termination.

"You agree that you will not use IP proxying or other methods to disguise the place of your residence, whether to circumvent geographical restrictions on game content, to purchase at pricing not applicable to your geography, or for any other purpose. If you do this, Valve may terminate your access to your Account."