Hi Noah's Dad,
I'm going to ask Jen Lopez to make a better comment on this, as she's the one who manages the SEOmoz Facebook page and has more experience than I do. I did have one thought though that by having users engage in your Facebook page you're increasing your EdgeRank on Facebook and increasing the chances that fans of your page will see your updates.
FB doesn't show an individual user updates in their feed from every person and page they follow. They've got an algorithm in there to rival the search engines that helps determine what a user sees. If there's a FB page in there where the owner is just putting announcements and no one is interacting, those announcements really aren't going to be shown to the rest of the fans of that page.
With you, you've got so many people interacting with you and posting stuff I see Noah's face every time I check my FB feed. It prompts me to click over to your FB page and see the updates from everyone else.
Just an alternate way of thinking about this, though I understand your frustration at the same time. I"m the one who manages YouMoz, and it's frustrating to see people thumb and discuss the post on FB yet not going over to our site and doing the same.