Most likely this is because someone on the dating profile saw the persons profile, thought it was interesting enough to &#x27;dox&#x27; the person.<p>If people knew how little information is needed to get started they would be either terrified or amazed.<p>First name + Location + Instagram profile and you are already off to a good start. And maybe there&#x27;s a picture from some marathon you participated in, and they might have an online list of participants, narrow down to matching first names, then look them up on facebook.<p>What facebook then sees mimics person A trying to find his new friend person B, which makes it natural to include this person on the other &quot;do you know list&quot;