I've sat in friends stands.... they have sat in mine.... its all been coordinated before so we don't step on each other.... common courtesy rules..... haven't had any issues too date....
That is exactly how my buddies and I have it worked out. Coordinate ahead of time. Usually buy them together and hang them together so it is just a matter of staying out of each other's way.
I have made one exception. Some jackholes hung a stand on one of my properties. They gained access to a 4acre property and decided it was okay to hunt the two neighboring properties. The following year they did NOT have permission on the 4 acre property but proceeded to come back and hang a stand anyway. I hunted that son of a gun, killed a buck, and left his junk on the stand. Bad enough when they are trespassing and hunting stands on neighboring properties. Worse when they have NO permission AND have the balls to hang stands. Now, they truly have an extra set of balls. Fuggers.
Disclaimer: I was not personally the one that left the junk on their stand. Had 2 buddies helping me drag the deer out. While I was field dressing, one of them disappeared. He told me later what he had done and I just couldn't bring myself to go take the junk off their stand. lmao