Unsettling in what sense? Like, it will eventually erode monogamy, and so cause more sexual inequality? It will break down gender-based sexuality, effectively turning everyone bi? Legalized rape? Dogs and cats living together?
(Channeling Multiheaded: Don't be so vague, especially when you're making predictions!)
I think I see a possible slippery slope based on between consenting adults, although EDIT: based on the above it was not be the one Konkvistador was thinking of.
Presumably clearly illegal: Let's say I mind control thousands of people into doing me as many favors as I want using a magical mind control ring that has a 99.9% success rate. (Obviously, these are not consenting adults!)
Currently legal: Let's say I advertise to thousands of people into buying a product of mine using a variety of technological devices and methods which altogether takes several day...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.