But this isn't a jury trial, it's Wikipedia. People being cited and quoted here have already said and done what it is they're being reported on as having said and done. It is up to the Wikipedia contributor to make sure the material reflects its proper context, and of course contributes to the article. You are in effect suggesting that some sort of behind the scenes investigation be carried on before anyone can even be considered for inclusion. In real world events, which is what Wikipedia I believe is trying to record, all kinds of whackos, crackpots, ignorant ill-informed yokels, and more are part of every conceivable type of human event, Do you want to try and pre-eliminate all the crackpots and yokels, maybe have some sort of a handy Wikpedia:Yokels never to be mentioned page. On that page would be a subsection: Violent environmental activists with no credible background: Mark Lynas. Is that what you suggest?