A New Form of Spam

I’ve been getting a new form of spam lately, similar to the infograph spam that made the rounds a whole back.
Instead of infographics, there is a link to something in my archives and a vague offer to partner on a “project” of some type.
It actually looks pretty convincing – until I realized an offer to work on a nursing research project linked to a post commenting on link policy.. Apparently the spambot was confused by the title: “Survey says…”
Family Feud as Bayesian spam filter. Who’d a thunk it.
Problem is, just like the infograph spam, real people send VERY similar emails. Hell, I’ve sent emails like that while researching a story. And I tend to send emails, because I’m doing research at weird hours.
So how can we prove our humanity when doing this kind of research? Any ideas?