[jaggirs]

I think he is right. But I don't like his tone.

The whole writeup is a tantrum on why you should stick to "well known" facts. Which sounds to me too much like asserting the truth of things without questioning them. Yes, there are a lot of fools out there whith a spookrijder complex that are a detriment to science. And I would assume a well-known professor would rightly get tired of their emails.

He only shortly adresses at the end that radical ideas are precisely what is needed for progress in science.

I do not think this dismissive mentality does the situation any good. If someone comes with a radical but stupid idea, you need to first recognize the merit in the idea, and then show why it is wrong. Bashing someone with "you cannot create free energy" will only encourage him to waste his time trying to prove you wrong.

I suspect a lot of these spookrijders are curious and fairly smart people, but who's ideas where offhandedly dismissed by a teacher one too many times.