I kind of never understood the logic behind being so private.
I've never used my surname or my hometown on any of my profiles. It makes it a lot less likely that anyone who knows me IRL will find me, which would be absolutely mortifying.
I remember this one guy, when I was school he sent nudes to a random girl on skype and next day he found out that the girl sent all his nudes to everyone on school
I was private about my social media accounts for the first year or so after being on ATRL but now I just don't care. Now that I'm out I don't have much to hide anymore so I don't care if anyone finds my accounts.