Red
Jason had always called Barbara "Red," maybe even from the first time they'd met. And now he had taken the name Red Hood and the Replacement was going by Red Robin, both of which were shortened to "Red" on an almost nightly basis. Which meant there were three Gotham vigilantes who answered to the same name.
Three "Reds" in Gotham alone.
It was more than a little confusing and of the levels of chaos only Gotham seemed to reach, but being Bats, they naturally made no effort to actually discuss it and therefore make any progress in straightening it out.
Maybe it's just me, but it seems like a serious tactical disadvantage to have a name more than one person is likely to respond to. I mean, they can't shorten Red Robin to just Robin for the same reason, but if they actually bothered to talk about it, they might consider shortening RR to Red and Red Hood to just Hood and limiting it to that (Babs doesn't get called Red out in the field much, except maybe by bad guys who don't know how bad for their health that could be).
And this is just the three in Gotham. There's also Red Tornado, there was Red Arrow for a bit, there are like half a dozen red heads, and I don't even know if there are more. Am I the only one getting hung up on this?
Am I also the only one that finds it endlessly amusing how many of the Dark Knight's kids favor red? Even Nightwing went red for a while (thank DC that's over; I'm partial to blue).
Anywho. Toodles!