Are you stating that this isn't harassment, or that you are incapable of being harassed on social media?
> Entering the public square means exposure not only to what someone chooses to see but also to what others choose to share with them.
This isnt a public square, let alone even a physical one. Even in the physical space, I am not beholden to look at what others share. I am under no obligation to take the flyer as I pass by. I am under no obligation to stop and listen as they prance around and try to get into my face.
These companies could provide a set level of tools for its users to be able to appropriately weed their own gardens, but they mostly chose not too. If she could set her app to not show her any video links from parties she didn't follow that pinged her, this probably wouldnt be an issue. There could easily be an middle ground between accept all harassment, and not visit the social club.
...living in a world where AI wasn't an enabler for abuse? What a bafflingly weird take - "you didn't object to <thing> when it was first thought of, so now it's being used badly you can't object to it"
They were in the library. Philip K Dick among others wrote extensively on likely downsides of such technology during the period you mention. Even were this not the case, you're basically arguing that nobody under the age of 60 has any right to complain because they weren't around when the concepts were first articulated. This is asinine.