When I was having my first, it was an assisted breech delivery. The doctor first tried to cut me with enormous scissors without injecting pain relief. I said no and he rolled his eyes 'jokingly' while injecting me with local anaesthetic and said "she wouldn't have felt it at the height of a contraction", so i was already annoyed.
Then just as the actual baby was about to be delivered, around 4 or 5 people bundled into the room and stood looking at me, legs in the air, smiling and laughing excitedly together. I asked what 'that lot' were all doing in there and a tiny little woman nodded her head excitedly and clutched her hands together and said with a huge smile, "we're here to watch birth".
That was it for me. No introduction, no explaining who they were, no asking for my permission first and I assume they'd assumed that once again, with all the pain I was in (it was excruciating as well) and the chaos, I'd just allow it like they expected me to allow the cut with no anaesthetic.
To be fair, this was a long time ago but there was absolutely no way I was being pressured like this and I waved them all out with an, "oh no you're not" and that was that.
I understand that the birth was a more unusual one and therefore interesting, but had they asked permission and introduced themselves first, I may have allowed one or two to watch, but not four or five.
It was disgusting and I felt violated by both incidents. As it happened things went a little wrong and the room descended into chaos with doctors everywhere. My son was fine eventually, but it was scary and I'm glad to this day that I didn't allow myself, as a brand new and very young mum, to be pushed around like that.