I do report ads in the wrong section. That's how I know that the same people do it over and over again. The tour operator should know better by now.
What's to report when someone provides a weird quasi ad-like response to an old thread. It's tacky, and not helpful, but I don't think it violates anything since usually someone did ask about that area, even if it was many months (or years) ago.
Rich
Reporting it will put it on the radar for the future.