What if instead of trying to collectively, bindingly define misinfo, we simply require(?) or strongly encourage(?) putting something like this next to every ~"s

What if instead of trying to collectively, bindingly define misinfo, we simply require(?) or strongly encourage(?) putting something like this next to every ~"share" button: "Before sharing with others, please consider: Does this come from a trustworthy original source? Is the original eyewitness known enough to be judged by you as truly honest, and competent at reporting accurately what they saw or heard? Is the full chain of transmission to you also similarly known to be honest and competent? Is it corroborated by other such reliable sources?" That could probably be made more concise, and with variations over time so less likely to be just tuned out. And study the results to improve how it is done, over time. I read about some study or two (unfortunately, I don't think I could find now) that said this made a difference. Maybe lying is a bad enough thing for society that we could make a law for facebook and such to encourage us all to just stop and consider reliability of our sources -- not government favoring one over another, but encouraging to think. There are always unintendened consequences, but it seems worth discussion and/or trying. Edit: maybe something like this could also help prevent governments deceptively propagandizing or subterfuge in others' elections, stirring up contention (i.e., general weakening) by repeating incendiary things on both sides of issues, encouraging attendance at both sides of angry rallies, etc, as has been reported so often as having been done, with respect to recent elections..... And the influence of mass fake accounts spreading unfounded things, etc. It sounds so hard to police -- unless we just systematically encourage everyone to stop and think. More edits: wording, misc.