Insane

That's my vote with regard to this headline:

9/11 Conspiracy Theory–Insane or Insightful?

The writer, who apparently worked for CNN at one point, goes on to talk about one of the silliest tropes:

I keep coming back to one question in the 9/11 conspiracy story: How did two jets knock down three New York City skyscrapers?

Answer: They didn't.  They caused a fire which knocked down the first two buildings, which damaged many surrounding buildings, including the third skyscraper, which burned uncontrollably for about 7 hours and finally collapsed.