I think utopian ideas in general would never work. I agree with the author that rigidly-proscribed roles are a very bad idea, especially when you're dealing with something so intimate. The rules of a BDSM relationship should always be set by the individual couple.

I think a lot of utopians just take their own preferences and lifestyles and assume everyone else would flourish under those conditions- and that seems like exactly what this group is doing. It's arrogant and it promotes closed-mindedness.

The REAL "kinky utopia" would be one in which nobody presumes to tell other people what they should enjoy, and no sexual preference is considered unnatural as long as it's safe, sane, and consentual. And we all know how possible that is.