As mentioned above, I think it being clearly indicated that it's an alpha/beta is very important. Not everyone follows development and I've seen way too many times people that think an alpha/beta is the final product.
You can try but Steam's "Early Access" with the banners that literally kick you in the head telling you what it is, developers putting gigantic disclaimers like DayZ "DO NOT BUY THIS" on thier store pages, Planetary Annihaliation the game itself screams "THIS IS A BETA!!!" when you launch the game, and people STILL whine the game is 'broken'
You can't beat stupidity out of people, trust me, I've tried