Originally posted by david.capps.1957:

Happens regardless of where I am.

At first I thought that maybe they were being pacified by fires at your base. Because that is definitely a thing. But then I read the above quote. I have not noticed a change like this with greylings, but then again i'm not sure how long it's been since I have confronted one. Been building bases in the ocean, mountains, and swamp for a good bit of time now.