My GD's school has a policy that parents may take footage of their children in school plays but they must not put it on social media.
I think it depends on how it is done. Theatrical costumes and makeup are necessary in the theatre. When I was a child, I used to pinch my sisters' makeup, swirl a scarf around my neck and totter up and down in high heels far too big for me impersonating a grown up. No one took any notice and I wasn't molested.
If, however, you are putting makeup on kids, dressing them provocatively, taking photos of them in suggestive poses pouting and putting it on social media, then yes, that makes me uncomfortable. And those US pageants are nauseating.
Or, as I have seen on occasion, children out and about dressed in clothing that is far too advanced for their ages. Heels, short skirts with midriff on show (they'll get a chill in their kidneys!) carrying hand bags. Plenty of time for that later on, let them remain what they are. Children.
I do still chuckle at a memory from years ago. There was a somewhat 'precocious' 'child' in my middle sons' year at primary school. In the last year she was taller than me, wore short skirts, was very pretty and if I had been her mother I would've been very worried indeed but she seemed to be very proud of the fact her daughter looked around 16. My son went to the end of school dance. He was probably around a foot or more shorter and when I went to collect him, they were slow dancing at the disco and his head was rather uncomfortably resting on her cleavage! I don't think he said much for a week. He looked so embarrassed
They do grow up fast these days. Let them stay kids for longer.