For non-trivial things? Yes, generally. Why not?
I mean, why do guys with phds in earth science or geology have to get lumped in with nuts like Neal Adams and his expanding Earth bullshit? Why would Tedx weigh them as the same?
I'm so sick of this "My bullshit is just as good as your facts" Fox News mentality. There should be discrimination and vetting and standards. The world simply has too many opportunistic and money hungry crackpots. These guys can go start their own little events.
The problem with branding yourself as a rebel outlet is that only a very, very small percentage of rebels know what they're doing. Climate change was once a rebel position, but the science backs it up, so we can rely on a basic form of meritocracy in academia to help unpopular ideas along. We don't need comic book artists going to conventions and yelling about "the establishment holding down expanding earth theory" and then trying to get a talking gig next to a real scientist who gives a shit about the science.
This also applies to guys speaking outside their fields too. Okay your phd is in engineering but you want to give a speech on how global warming is fake? Yeah, no thanks.