Hi Raffles: I think a big part of the problem is that MR Deals pages are public. Compound the problem with people's tendency to over-embellish the subject line, and you can see that any info posted here is easy prey for millions of Google searchers. And when even FT'ers slip, what incentives do those strangers have in guarding our info?
So the lesson would seem to be, don't post. But that defeats an important purpose of a community like this, which is to share and learn from one another.
A good if partial solution to the problem would be to restrict such forums to members who must be logged in.
In the meantime, a good compromise is to post, but with an eye towards thwarting casual Googlers. Don't be too specific, but consider providing more info to those who request by PM. Remind everyone, in posts as well as PM's, to follow the same principles.