The poll was back in 2007 but they it left it on-line, not to measure the response about 2nd Amendment, but to observe how information ebbs and flows around the Internet. The poll numbers are meaningless.
May I make a suggestion?
When somebody sends you a link to a poll, first go to the organization's home page (like USAToday) and try to find a "drill down" (a link) to the poll. If you can't find a link from the news organizations page, then either it's an old, out-of-date, or it's a hoax.
Some of these are actually trying to plant viruses and such. I rarely, just blindly click on links people send until I scope out the validity of them.