Ha! Don't worry - I deal with stuff like this all the time...
wrt the M4, see power supplies with minimal radio interference? and work back from there....
wrt testing the M4 and similar, no one in their right mind would if they fail to meet standards and regulations. IE - if they fail the regs ec, then you are just reinventing the wheel - it can cause problems.
However, that is probably a perfect candidate for MythBusters - try to prove "facts" instead of myths. (Not that anything is strictly speaking a fact, but I hope you know what I mean...)
wrt to testing your situation, that reflected how issues get out of hand or misinterpreted...
We were not testing M4s or non-speed radars or non-copcar equipment - we were testing an hypothesis that <whatever> caused your outage. (THAT is the scientific method. Refer to statistical theory etc. And psychoanalysis - ie, Boolean Algebra.) We were not testing other power supplies, or other people's set ups. (Or at least, I had no intention to!)
This is simply a case of your thread being hijacked.
And me breaking my own rule of not responding to questions that are not from the OP. (But I hate authority - no-one tell me what not to do!)
Besides, with all those fitting anti-theft devices, why would the cops or OSA need EMP devices - others have done it for them.
Free firewall or virus-checker anyone?