I'm going to assume that he thought she was of age. But maybe the website is made for arranging hookups with teenaged girls. Don't know. I'm also going to say that I don't think money should make fornication illegal. Either way, if he paid for sex, he knew that's a crime. If he did that, he's a huge disappointment to the libertarian/gun rights community.
Why are you equating libertarian with gun rights? Shouldn't libertarians hold the view that what people do behind closed doors is not a legitimate government interest? Would it be all right if she was underaged and he didn't pay for it?
I'm not equating libertarianism with gun rights. I'm saying that both pro-gun conservatives and libertarians had reasons to sympathize with his gun projects. The last I heard, Wilson himself is a professed anarchist. (Also, I'm not of those who think libertarianism is a bad thing, nor am I in the habit of tempering my language for those who do.)
Regardless of what might be a "legitimate government interest," Wilson knows that paying for sex is currently illegal, and could easily endanger the
gun rights human rights work he's put so much into. So - major fail.
No, I'm not saying that having sex with unpaid minors would be alright for Wilson to do. What I'm saying is that he might be mistaken about her age, but he couldn't have paid her accidentally. (Assuming he did pay her, but since he sourced her through a site called "SugarDaddy.com"...)