I don't think that people are taking this poll to mean anything other than the informal Twitter poll that it is. From what I gather,
@darjr the OP is using this Twitter poll as a way to invite similar discussion on the subject in this forum and posters here are supplying their own answers as part of that discussion.
Most scientific questionnaires typically include questions that let you filter responses, though not by notions of "true gamer" or "fake gamer." However, I think that most people here are able to recognize that this is an informal Twitter poll, which is why most people aren't working themselves up to attack the validity of an informal Twitter poll on scientific grounds. So I presume people here use their own sound and reasonable judgment to put a limited amount of stock into any conclusions drawn from said poll. As
@Umbran says, a Twitter poll will not produce a poll with scientific rigor. Of course, that also doesn't preclude people from being interested in the results of an informal Twitter poll.