It's a pretty simple fact that the more people who strongly trust a signal, the more value there is in mimicry of it. Because birds understand that Monarchs are poisonous, there's great value to the Viceroy in being a good mimic of it.

So the more strongly people trust science, the more value there will be to con men in passing themselves off as scientists. We can mitigate that to some extent with scientific reputation and whatnot, but I don't think we have trust fully figured out in general, as there's always the bootstrapping problem.