I find that what I attract aren't necessarily creepos, but eccentrics who somehow expect that I would understand them.
I can't think of any one particular anecdote, but these "encounters" usually involve them telling me their whole lives/ a particular moment in their lives, ending with "I can't believe I just told you that," or "Thanks for doing this."
Oh yeah, these people are usually those who are involved in some "passion/ cause" of some sort, like one was a student activist involved in labor advocacy, one was a music major. And they seem passionate about what they're doing.
Did they freak me out? Sometimes, when they'd be too intense and start to kind of shout at me. I just wide-eyed in front of them and nod slowly. They seem to interpret that as "Yes, I understand."