I have been "cold-called" via email a few times from non-technical people looking for a technical co-founder. I'm still a student at the moment though, so I feel like anyone that I should be working with in the near future should lead in the technical aspects.
I have no idea how it has worked out for these people.
yeah, I get these too from time to time, they go straight to my trash folder. I have my own ideas for startups so I would never just "hook up" with some random person to join their venture for equity only unless I already knew them well and respected them. Of course, if they are actually willing to pay money then its a different story.
