Originally Posted by redman5427 
Is this even possible?
Consider me in please
Until you buy something you only need a valid email adress. At least it was that way until I registered. It should be possible to use a junk mail address. That way you can use some of the Steam advantages without providing personal data.
Of course I don't know what requirements the alpha has. Maybe you'll have to sign an NDA, maybe you won't. I don't know.