About a year ago I received an invite from the Sound to take part in a music focus group to be held on a Saturday in Pasadena. I enthusiastically accepted right away even though my personality is such that I am the last type of person who would normally give up their hard-earned Saturday to help them focus their playlist, but (1)I wanted to get a first hand view into how the test was performed in person and (2) I wanted to be that "guy" who does exactly what you described. Even if I answered the questions "truthfully" I would still probably be considered an "outlier", but I was going to go for the gusto a vote down every Who, Pink Floyd, Aerosmith and the rest they tested whether I liked them or not and vote up anything that was not already on the playlist or some otherwise novelty record. But as Billy Joel sings, something happened on the way to that place. My second invitation, you know the one where they actually tell you exactly where and when it was, got "lost" in the electronic email. I even emailed them asking why I was omitted since I live nearby and "as a fan of the station, I really wanted to participate". No response.
How did they know? I didn't tell anyone, not even Mrs. Flipper my plans. Foiled Again! Somehow they knew. I don't know how they knew, but I am convinced they knew:
"He is the oddball. Not worth the invite, we'll just be cleansing his data later".
I'll never know just how they knew, just like I'll never know how they got my name and mailing address when I had never given it to them in the first year they were on.