Well, capes are wusses, generally. They don't go in for the whole "retribution" thing, that's giving in to your raaaaage and bucking the system they're supposed to protect, or whatnot.
Gotta be careful around some of them, of course - the Wonders or the Hawks will fuck your shit up but good - but no one's afraid of an Arrow. (You know the Calculator maintains a helpful website. "Black Canary: All known associates are capes, but when civilian daughter was kidnapped, kid died, no retribution of any kind to LoA. 7/10 safety rating for manipulation-through-loved-ones. Batman: Some civilian associates. Sarah Gordon killed by Joker, Batman prevented widower Gordon from killing Joker. 10/10 safety rating for manipulation-through-loved-ones. Wonder Woman: Many civilian associates. Adopted sibling Nessie Kapatelis hurt by Longo mob. Longo mob obliterated within 48 hours. 1/10 safety rating for manipulation-through-loved-ones.")