> The fact that there is no clear cut demarcation point between non commercial sex and commercial sex is why Craigslist pulled all its personal sections in reaction to this.
There is no demarcation that is easily observable by Craigslist or other dating sites. You're right, it is offensive to most people to say that the distinction between transactional and reciprocal relationships is immaterial or nonexistent. They are, in my opinion, right to be offended.