We've probably all seen this before. A Heavy with an aimbot, crits, sometimes bizarre noise and particle effects, and more speed than a Scout on a caffeine drip enters the server and ruins the game for everyone. This type of hacker always has a name-changing hack which copies the name of other people in the server, often leading to kicking and banning the wrong person.
We know that VAC probably catches these people soon enough but it seems that they still show up way more often than they should. If Valve has done the most they can in catching them, then the least Valve could do is simply make it so that your name does not update in game in real time. This would solve the confusion and innocent banning/kicking which results from the name-changing hack.
If you agree that something more should be done to stop this, then join this steam group. http://steamcommunity.com/groups/stopthehackingheavies
Valve has shown that they listen to their customers in the past. Maybe they will again.