Sure, if you have specific information about the people polled and the general makeup of the population, you can extrapolate these results. I didn't see that it's happening here, it's just the results of a specific group who bothered to answer the poll.
Having 3000 responses doesn't automatically mean the results are meaningful. I can poll 5000 Facebook employees and get results that say 100% of them have a vacation plan and 90% of them have taken a day off in the past year.
Having 3000 responses doesn't automatically mean the results are meaningful. I can poll 5000 Facebook employees and get results that say 100% of them have a vacation plan and 90% of them have taken a day off in the past year.