It all boils down to what each of us personally considers acceptable. I've been on this forum long enough to know that there are many people whose idea of acceptable is far different than mine. That said, I guess I've been guilty of intentional campsite spreading.
When the kids were young I would internationally look for sites around a curve where our group could reserve and effectively get a larger campsite. Like this picture below where we would grab sites 22,24,26 and had a huge campsite for the kids to play in or whatever. So yes we were spreading, but at the same time we intentionally spread where there was nobody between us.
I've been camping where people are setting up cornhole boards in the road between two non adjacent sites and I'm okay with that. To me as long as they aren't drunkenly yelling out F bombs every few minutes or cheering excessively loud it's just people having fun. But again that's just my comfort level.