Hi Tom,

Well, following on from a recent discussion about people who talk beyond their level of knowledge -
http://wordsmith.org/board/showthreaded.pl?Cat=&Board=words&Number=83749
- I think your word should be something like environultracrepidarian. But it has to be said that environidiot rolls off the tongue better.

Eta's agent of destruction could be distinguished by being called an environdetrimentalist.

I quite like the internal rhyme of environmoron as yet another alternative...

There's probably quite a bit of scope for types of idiot.
You could have a vidiot, someone who always believes what they see on TV, for instance.