I find this a sore topic with many, maybe because they do it with their own children and don’t want it to be wrong. My cousin used to let her children play naked in the garden where passerby’s could see them. I mentioned it and she was furious.
As for the internet, chickens are coming home to roost now. Those that are looking for jobs of uni places have realised their past matters and are taking pictures and posts down. Parents who have pictures of their children stolen may not ever know it however.
We stopped sending pictures to MIL when she requested bath pictures to put on a “grandchildren site” she read 😳. She had previously asked for pictures “pulling stupid faces” (she didn’t get those either). The site sounded sinister.