There might be something to this if there was a protocol for delivering secure data over diffuse particulate matter...

Honestly, is there something stopping you from encoding a signal by modulating the airborne concentration of some particle? Maybe something that doesn't occur commonly - use e.g. helium instead of nitrogen or something like that.

If you're being attacked, you'd like to know about it. This thing is more of a forensic device to figure out how you were attacked afterwards.