(I had to search to make sure this didn't already exist, and I'm surprised it doesn't.)
"Show me pictures of my family" (stock photos)
"Show me my vacation photos" (synthesizes a photo of me at the grand canyon with my waifu)
It wouldn't be a social problem as legacy social media is so yesterday, only auntie and grandma still use facebook and corporations and bots are now the majority users. You just know grandma is going to get into the weirdest flamewar ever on myspace or ICQ or twitter with your social media bot avatar.
I think it would be useful to have a bot run my linkedin for me. A form letter to respond to recruiter form letters. Every week it goes to Google Trends, runs a query on "computer language" to find the trendy framework of the week, and ta da I am now an expert on linked-in for "computer graphics programs in c language with output" "what does pdf mean in computer language" "computer in hindi language" and sure you laugh today, but normies (like HR gatekeepers) google for this kind of stuff all the time, and if my bot's effort posting gets me jobs you're not getting, well, we'll see who gets the last laugh ...
4chan by voice. What could go wrong?