Let's face it ladies, the woman who is giving birth has the right to allow or disallow whomever she pleases in either the delivery room or the hospital waiting room.
I learn something new every day. Thanks, Still - I find that I agree with you 90% of the time - but I have always felt that nobody but the young couple and medical team belong in delivery room - it can be a significant medical situation - not a party or family reunion. But I did think the waiting room was public and open to all.
I don't have grand kids - but your comments have made me re-think. If a son and DIL were having a baby, and lived out of town, I probably would not visit for a few weeks or months. Let them get settled - wouldn't barge in when the baby was brand new.
If a son and DIL lived in same city, I would not go into delivery room - wouldn't even want to be asked to - but I would have felt entitled to go to waiting room, which I consider a public place. Some labors can be 24 hours or longer - I would not want to spend that much time there before the birth - But I would have felt that I could go to waiting room any time I wanted - that I was not intruding by doing so.
Your post has made me realize that I should cut an even wider swath around a DIL in labor - go to hospital the day after birth and see the little one then. Of course I would not stay long - ten minutes max. But if I ever do become a grand, I will not wait 12 hours to see a baby for ten minutes. I will wait at home - the DIL can have whoever she wants in the waiting room - and I don't need to be there at all.
Good perspective just in case I ever become a GM.