Just found this link for a crazy weapon that was in looked at for the war in the pacific.
http://www.murdoconline.net/archives/002367.html#more
Basically the idea was to fill a large bomb with bats, that carry small incendiary device, that were timed to go off a bit later on.
Mainly aimed at the paper and wood built houses in Japan.
The Japanese also tried the 'setting fire to your enemy' technique. They let go a few incendiary balloons, into the jet stream, aimed at landing in amongst the forests of west coast America. And a few of them were successful.
An all black airborne battalion, the 555th (Triple Nickels) were dropped in to put out the fires.
So maybe it wasn't as crazy as it seems.