Having done quite a bit of legal transcription, I am sadly dissapointed at how many cases turn into he says (the cop), she says (the citizen) especially as relates to permission to search. Based on this informaiton, I have sent myself (via USPS) a signed, dated letter (which I have not opened and will not open unless needed) that states:
"This letter is to certify (for whatever purpose it may become necessary) that absent a signed, written statement to the contrary, I, (my name), do not give my consent to any search of my person, my home, my vehicle, or any other area that may be under my control to any individual for any reason.
"Absent a signed, written statement to the contrary, I do not waive any of my Constitutional or common law rights. Any statement by any individual that I have agreed to orally waive my rights should be considered suspect."
I also have "I do not consent to a search" stickers at each entrance to my vehicle (below openable windows, etc.) which will be supplemented with something warning of audio/video recording as soon as I've installed that equipment. I'm not sure if all this would work to overturn the natural Court bias to believe police officers over citizens, but it should at least give them some pause.
The mailing is needed to prove that the statement was written prior to the date on the postmark (so no one could claim I wrote it after the fact to cover my ass). This purpose could also be served by having it notarized, I suppose, but I think the stamp cost is still slightly cheaper than a notary.
I don't plan to go out of my way to attract police attention (though there is a little voice in me DYING to fill a small pink zip-loc with talcum powder and carry it in my sock) but I want my ass covered if their malevolent gaze shifts my way.