Yeah, right. No body will buy that.
Your wish of anonymity was lost decades ago. If you posted something here that was illegal, and DHS decides they have some spare time to take anti-trafficking efforts up a rung and go after the next level of participants, you will be identified via many different means and invited in to the 'office' to answer questions. All the lawyers on this site might tell you that you are safe, but every day the internet is used to track down anonymous posters. It is just a matter of time. For all you know, this site was designed to do just that, resulting in the most massive sting yet.
The best thing to do is not do it in the first place. The worst thing to do is do it, then publically boast about it. Let's summarize, you paid for sex, somehow in your mind convinced yourself that the hunt is foreplay and it a was romantic encounter, or simply transactional, and don't stop to think that you would never get this womans offerings or time of day in any other circumstances but paying for sex. But you forget, and having brainwashed yourself into thinking you are suave and sexy, and decide it is wise to brag on a public bulletin board about your illegal encounter.
Good luck!