Age and city isn't all that identifying, I don't see anything useful there that isn't already in census etc. They are just doing it because YouTube promotes highly commented videos, hence the old saying "like, comment and subscribe"
It's not the age and location that are concerning. It's that the seniors who are especially susceptible to being misled will identify themselves as such. Further, if you look at the comments from these seniors, their YT usernames often reveal their real names.
