When all else fails, skew the data! I plan on lying, plain and simple. Nothing at this point to be accomplished by harrassing them, threatening them, or calling the cops, who won't prosecute them anyway. I'm just going to tell them we all got our shots since we're "essential frontline workers" and leave it at that. Not giving them any forms, ID, names, or anything. This is exactly how I handle the Census workers too, just tell them "X" number of people live here, and be pleasant about it. Just get your address checked off as "non-threat" and let them be surprised the next time they show up. I've knowingly lived with active surveillance of my activities for over 30 years now, they already know my opinions on most things.