Has anyone living in the midcoast area (specifically Rockland, Rockport, Thomaston area) noticed people in high viz vests being dropped off at the end of their street and walking door-to- door?

Two young me were dropped off at the end of my street yesterday morning and seemingly went from house to house asking questions when my neighbors answered the door. I’m curious to know if anyone’s talked to them as I intentionally did not answer the door when they knocked. Does it have anything to do with the anti PTP initiative that we’re all being bombarded with?