What not to do in a Customer Survey

I've seen a lot of sites that belong on my "what not to do list" but this is one of the worst I've seen in a while. I tried to leave a comment on MetroPCS but was unable to without answering numerous other questions. MetroPCS requires customers to answer all 30 questions in order to submit a comment.  I understand the desire to get customer feedback on a number of issues but this is ridiculous. So ridiculous that you have to wonder if they really want user feedback.