You typically sign / agree to NDA's when taking part in BETA's (unless it is an OPEN BETA) or typically any private contracts / agreements.
So, if you decide to say something or 'leak' info, don't be surprised if you are caught out and lose your whole account or maybe something worse even (yes, I know you can easily create another account or use different details).
Just saying...
What the mind can conceive, it can achieve.
They will never remove LAN from StarCraft 2 reasons being...
1. Its way to big in Korea and they dont connect to battle.net when hosting comps such as the Intel Classic League.
2. I highly doubt that LAN organisers such as dreamhack (which blizzard do go to promote) connects to the internet and ppl play on there.
Just my 2c