For your information: map tacks are not private. they can be seen by everyone.
not that I have used any in civ 7 yet, I donāt think, but that kinda sucks! If I knew what I was doing at this stage of learning the game, I might use them like I do in civ 6! Right now, not really planning anything, just going turn by turn. So victimize me at your leisureā¦ 