How to avoid unwanted attacks?

When attacking other participants during the game, I usually don't care whom I'm fighting against.
The problem:
My support squad is much bigger than my top squad and there are much more in my faction.
Sometimes I don't have all the names in mind.
I don't want to attack my friends accidentially. Does a tool or something exist to avoid situations like that?

 

if their in your faction then add them to your squad so you dont attack em