> Being banned from all “GoldSrc” games

This isn't true, or at least it wasn't back in the day. The logic Valve seemed to follow was that VAC was "engine" bans. If you got banned in a GoldSrc game, you'd be banned in all games using that engine, but you'd be allowed to continue playing source games. The same was also true in the opposite case.

More importantly, this meant that getting banned in Modern Warfare 2, wouldn't get you banned in any other game, since no other games were released on that engine.