Assuming Q is not legit, all Trump or Flynn would have to do is respond: "Q is not a part of the Trump administration, and Trump is not Q+, disregard them immediately." But they never say that, instead asking more questions to get us thinking and researching.

Again assuming Q is not legit, Q could have at any moment in the past completely disregarded the entire movement, thus disregarding any legitimacy of the research and give Trump and Flynn bad optics on both sides for being so aloof.