paladin181: Hahahahahahahahahahaha... WTF would VALVe need my Phone or credit card number for?
As I explained above: in order to permanently kick you out of an online game, if you cheated. Or at least until you acquire a new credit card or phone number.
In the long run, that alone would make it pretty much impossible to create such automatic cheater bots (that play autonomously without any human actually playing) that are currently infesting e.g. Team Fortress 2. The cheater program couldn't keep recreating new throwaway Steam accounts for TF2, if it always needed a new valid credit card or phone number for that.
The counter argument is that Valve doesn't want to go to such measures because they want to keep it as easy and simple as possible for new users to join their service (ie. create a new account). Ok then... in that case make it possible to select within the online games that you want to play only on servers which have such validated Steam customers. Those who don't want to validate themselves (like the cheater bots, and people like you) can play on separate servers among themselves.
paladin181: And DRM is unneeded. It serves little to no purpose even in MP. There were LAN and ad hoc online connections long before there was DRM. DRM just serves to take control away from the end user.
You are comparing apples to oranges.
On LAN parties you know who are participating in the game (your close friends more probably), so the possibility of the cheating is close to nil, and even if someone did and you suspect so, you can easily kick them out of the game for good. You could say all the LAN players are already validated, you know who they are.
It is a different story on public online games where you usually don't personally know any of the other players.