I can just picture it now:
(Slade and Oliver sit on the ground, having just finished beating the Hell out of each other. Thea stands nearby):
Slade: So kid I've been thinking, maybe what happened to Shado wasn't really your fault afterall. Sorry about killing your mum and trying to burn down your city, my bad.
Oliver: It's ok, I forgive you.
Slade: Good, I'm still going to be a badass mercenary/assassin though.
Oliver: Ok, see you around then?
Slade: Maybe, just maybe (walks off).
Thea: Oliver, WTH are you doing? You're just going to let him walk away after what he's done?
Oliver: Hey, I let Malcolm get away scot-free not to long ago, and he didn't have the excuse of being hopped up on Japanese super-steroids after getting horrible burned while trying to help me.
Thea: ??????
Oliver: It's a LONG story, I'll tell you about it later. But right now, how about lunch?