What it do? Default raid UI
 

What are those scopes on raidframes? What they suppose to represent? Seen it constantly here and there. It is in default ui?
Retail only?

So it aggro indicator.

Is it works with enemy players targetting you or will only triggers when pets involved?

Also what yellow and orange color represent?

I know in pve yellow would be aggro danger and orange is critical aggro danger, but since all screenshots are from arena environment it make it a bit confusing since actual aggro is suppose to be just on or off there?