Spam Definition Changes from Unsolicited to Unwanted?

I was just reading an article on Q Interactive about the results of its "Spam Complainers Survey.” They come up with some interesting (and challenging) information.

“The mission of the survey was to uncover consumers' perceptions of what they consider to be spam, why they report emails as spam and what they think happens when the ‘report spam’ button is clicked.”

“Among the most striking findings of the study is the fact that the definition of spam has effectively changed from the permission-based regulatory definition of ‘unsolicited commercial email’ to a perception-based definition centered on consumer dissatisfaction. Over half of the participants, 56 percent, consider marketing messages from known senders to be spam if the message is ‘just not interesting to me’, while 50 percent of respondents consider ‘too frequent emails from companies I know’ to be spam and 31 percent cite ‘emails that were once useful but aren't relevant anymore’. (Respondents could select more than one answer for multiple questions in the survey.)”