I used to find people I knew and find their hidden social media profiles across the internet. It used to be easier when raw results was presented on search results
Found out too fast people asking about medical advise on gross topics. Or the IT guy's comments on thirst traps on social media when researching what he like for secret Santa.
I can dig pretty deep into people's online profile since most people don't have great online hygiene. Online degenerate Friends say to find info about people and I'd find who lives with them, ph#, address, school photos casually looking. I'd joke "I found and used your IP address" to make it seem more dramatic but really just chased down their chosen screen name