Not intending to get into this specific debate, but that's precisely the wrong way to think. Well respected individuals with a good reputation risk their's every day. More importantly, for many, jacquesm is a faceless individual. How can you be certain he's the one who concocted this plan and it wasn't someone who fished out his information in order to utilize his reputation to gain something? Especially when this so-called "jacquesm" is trying to phish out information from the HN community, something that could hurt his reputation regardless of the intent.
I'm not suggesting he wasn't who he said he was, nor should be distrust him. Rather, we need to always be aware of what we trust (and an email from a friend is merely that, an email, not your friend).
I'm not saying anyone here did anything terrible, but usually when contacted privately you first respond privately, so this is a bit out of order. It's not like jacquesm wouldn't have listened to arguments about this, and so an immediate action in the form of this post is, well, just bad form.
Edit: jacquesm has come forth with it, so I've replaced "a contributor" with his username.