It's been a while since I did that sort of thing, but from what I remember: The vast majority of "night vision" cameras are active IR, or sensitive enough that proper reflective surfaces trigger activity if they change a large enough area.

And the type of imagery these searches are looking for, would most likely be fooled by a couple of reflective strips blowing in the wind. Although I might recommend using strips of that reflective stuff on safety vests, that way you'd really "poison the pool".

EDIT:

Don't tape the strips across the street. Hang them nearer the camera so they occupy a larger area of the footage and triggers more easily. Although not on/close to the lens, that will make them notice too soon. You can even just tape a stick on top of the camera that goes up like a fishing rod, with some strands of fishing wire to reflect light in the moisture that condenses(basically a fake spiderweb).