I'm pretty sure Steam bans accounts for that sort of thing.
lol. No steam doesn't. The last time they did anything was 4 years ago with Modern Warfare 2 and even then they didn't ban an account. The only time they did disabled accounts was for their Orange Box.
IMO, those keys are fine if they're region free and don't require a VPN to activate.
They can and will ban you for it. There are ways to avoid getting banned (which is what seems to be confusing you about this), but I'm not going to explain it for personal reasons.
Lol speak out of your ass more. "I can't explain because it's a secret." --- Holy high profile batman... http://i.imgur.com/ldincx4.png http://www.youtube.com/watch?v=u155ncSlkCk