Well, you do get some delicious power armour off them when they die. Nice if you're strutting around in Brotherhood Power Armour and the shine's coming off it.
Thank you. It's not blood though, it's red paint the Outcasts purposely apply to set themselves apart from what they perceive as the "false Brotherhood".
"Hey buckethead, shouldn't you be humping that laser rifle?"
God, I hate those fuckers. If it weren't for all the 5.56mm bullets and stimpacks I'd kill them every playthrough.
Epic Outcast fail on my part!
Damn. I thought it was obvious. I must be pretty awful