I have one name that I didn't list, because of that concern. That's a good question.
I hope Duke passes through here and sees your question. He might have some interesting insights/perspectives as to the advantages and disadvantages of publicizing sales and why traders list sales at DNJournal.
The exchanges all list recent sales, and unless the whois is cloaked, it isn't difficult to find out or, at least surmise, who the purchaser is.
