Agent Faustine writes:

...

But since I did want to be found, it seemed perversely interesting to see if he was the kind of person I could get to find me the same way I found him...somehow it was much more satisfying to let him think my post was a coincidence and he was the one being clever and doing the sleuthing. <<

This is semantic analysis, by analogy with lexical analysis. In the latter you look for misspellings, idioms, word choice, sentence structure choice. In the former you look at meaning. I suppose they're both a content-aware form of traffic analysis. Otto A.K. Sear