I'm a Virginia Postrel fan. She was one of the few Day 1 links on this blog, I have subscribed to Reason over her term, and I've had a copy of "The Future And Its Enemies" from the day it landed on the shelves at the local bookstore.
But on stem cell research she's lost it. We can argue about whether embryonic stem cell research ought to be banned or not. What is unmistakably wrong is that Virginia Postrel's opponents are "criminalizing science" or are supporting "prison terms for biologists".
Unless we are to assume that she believes that anything a biologist might want to do for research is legal and ethical. Which puts her in some select company - do I have to mention who?
I expect better than that from her.
UPDATE: Gary Farber attempts to teach me how to parse English. The post I was referring to was "Ban Stalls", currently at the bottom of her site (her permalinks don't work). I responded on GF's site.