I will say I get kind of age blind when I do anything fannish online. I think what I tend to end up liking enough to be in fandom has enough cerebral angles that the age of the fans getting involved isn't a huge priority. Right now, YouTube fandom has put me in the unique position of being among the youngest members of one YouTuber's regular fanbase and among the oldest for a completely different YouTuber. In both cases, I'm seemingly the odd one out, but no one seems to care all that much.