Valve Now Allowing Banned Players Access to Games
Apparently, Valve had quietly implemented an account policy to allow banned players to access their games months ago.
Valve’s apparently updated its account policies to allow banned players to access their games. Previously, users who had been banned from their Steam account were locked out from playing their games, bringing up complaints about Steam’s DRM.
Valve’s change in policy was quietly implemented, according to a recent forum post by Steam forums Volunteer Moderator Heffebaycay, about two months ago. Heffebaycay’s response spawned out of a thread regarding EA’s recent policy change also allowing banned players to access their game.
Under the new policy, banned Steam members no longer have their accounts disabled but now have “account locking” set, meaning that while they’re able to access their games, they will be unable to buy games, redeem codes, or trade items.

You have not seen statistics then. Huge majority of the gamers are single player with only occasional multiplayer experience.
Maybe this policy change is related to other kinds of bans, such as those caused by fraudulent payment, sharing/buying/selling accounts, using the account for phishing, etc...
This.
The whole point is to stop people from cheating. Why restrict their access to single player games? It must be more complicated than we think.
Ehh, it's not always fraudulent. I don't know all the specifics, but there have been times when something unforeseen happens regarding payment and people's accounts have been disabled - with no recourse for appeal.
Stop buying/using Valve products and let the cheaters have at it.
But really, this article was not written right.
I cant believe Im saying this, but something positive came about from Origin implementing this several months back.
http://www.tomshardware.com/news/modern-warfare-2-cheating-steam,9173.html
lol, like a penal colony?
Good question, to be blunt. Frankly, I believe there should be two sets of servers: one where cheating is allowed specifically and one where it is specifically banned.
Yeah - MP types are really just a vocal minority.