Maxwell wasn't insinuating or implying that women are "dirty, lying sluts," Tim.  He was stating that not all of them are being truthful, either accidently or deliberately. Many of them were asked to think back over their lifetimes- just how accurate do you think that is?
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Furthermore- even if the phone responder taking the survey was being truthful in their self-perceived experience; this doesn't match with or convey any meaning to actual definitions of "stalking."
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If asked, "have you ever received an unwanted phone call," I could truthfully answer "yes," (how about this telephone survey, for starters,) and that would have nothing whatsoever to do with perceiving that my safety and life are in danger, which is what actual stalking entails.