So between regular and rated bgs (bad ones) I think I have a grip on who guards flags. I think people go through the following things:

1)  Is no one at the base guarding it?

Good, someone else can do it.

2)  I’m the only one at the base but I’m going to leave because

Someone else can do it.

3)  I ran like hell to get the flag but I’m not going to guard it because

Someone else can do it.

4) I’m at a base but the enemy is coming, I’m gonna run off because

Someone else can do it.

I did have a very good yolo tonight though that were calling incs in AB and aoeing like a boss.  That makes me happy.