Always always put in fake names emails etc when creating accounts. I do not know why anybody puts in their real names in the first place.
I junk-fill some signup forms and use Hide my Email for others, but it’s never less work than just using real data (well, with few exceptions like WiFi registration pages that I encountered before and don’t require data validation)
If I had to guess, probably a combination of baby boomers (really old people) and Gen XZers (really young people).
Those of us who grew up with the internet (me, millenials) got drilled in to never ever fucking never share our real name or street address. That 18/F/CA in the chatroom? That's a middle age GIRL (Guy In Real Life).