Is a default friend? O_O I'm wondering because I see them on my friend feed & last time I checked I had no friends.

I don't have them on my friend list...maybe they're automatically added unless you have other friends

I don't have them on my friends list either...Hmmm? That's curious!

Neither do I.

One way to find out. Make some friends and see if Subteam is still on your friend feed list!