It depends on how the antennas are aimed. They are directional after all. For example, you talk about an "old school" microwave long distance relay -- how likely is it that this will be aimed at you, the ground, etc. It is aimed, as tightly as possible, at the next relay tower.
To the direct south of me, just five houses away, I've measured levels of 24,000 microwatts per meter squared (on the sidewalk) -- one-third of the reading directly in front of a working microwave oven. Move ten feet (or one foot) over and it is "just" 2,000 or 4,000. Outside my home it is 700 and the one time I took readings north of me I gave up after a house or two -- they were in the 100 range. And yes I have an "antenna farm" just a hundred yards away, with dozens of antennas spread over an enormous retirement center roof. By the way, at the base of all that, the front door measurements at the center are just 100 to 300.
It is about are you line-of-sight, and where are the antennas aimed.
My video on the subject.