Using Shotgun Mics Indoors...

...might be a bad idea, according to this interesting piece I read this morning.  Check it out four yourself; I'll post a bit of it here to whet your whistle...

I have been researching an idea that I have been hearing for a while:

It’s not a good idea to use a shotgun microphone indoor.

I want to check this question out and, eventually, make some tests. Here we go!