Ignoring who is involved and looking at just what it sounds happened, I can understand how both sides are feeling. I see it as more of a miscommunication than anything.
It looks like Octane looked at the signatures that were shown to him as examples of what the recipient of the signature wanted and used one. The joke being (I'm guessing) he just gave the recipient exactly what he wanted by giving him one of the examples of what to follow.
That being said, I think that Octane could have handled it better. He should have made it clearer in his explanation and apology what happened and what was intended. I can understand why Sidra isn't happy. He's seeing how people will jump at the chance to attack someone like FadeToBlack, but because this was done a few months ago, that time annuls the misdeed, it doesn't matter and that it has voided his right to be angry and to express it.
When he's talking about you, madball, he's just saying that you like to pick and choose the people you'll stand behind and those you'll do quite the opposite.
I don't, though, condone the attitude SK is having. This can all be handled much more effeciently if its repaired with a little more order.