I found this post from Jeff Atwood and I understand what you mean now. "I’m less worried about the ragged edges of the system; it’s when we have three GRATUITOUSLY meta-tags hogging up space in the top 10, top 30, top 40 tags that I start to get worried.
So we don’t have to stamp out every iota of meta-tags, we just have to DISCOURAGE it, and make sure it doesn’t come to DOMINATE the top (n) tags list — as it did on Stack Overflow."