Scientifically conducted polls are the only ones that have any real meaning because their results are backed up by a tested and proven methodology. You can cite any poll you want, but if there is no scientific methodology then the results don't really tell you much of anything. Looking at that poll you cited, it just tells us that of the people that
chose to take it, a majority preferred Spidey being married. You can't even assume that the over 5,000 votes cast in the poll represents the views of that many different individuals, considering how simple it is to vote multiple times in an online poll. Online polls are a novelty, useful for encouraging discussion and getting hits on your website, not for gaining a real understanding of a population's opinion on an issue.