That picture's already been mentioned before here, at the point when we did see a confrontation between Tails and Fiona.
Feel free to carry the discussion on in this thread - I'm just linking the two in case people who've already commented don't want to repeat themselves.
You can take my own views there (they actually start in my previous post to that, a couple of posts beforehand) as read.
I've seen the aftermath of Sally's punch before - where she's drowning in testosterone and all that after the boys react - and thought it was, at best, exceptionally silly and childish for Sonic and Khan to make such a comment and for Sally not to give them a piece of her mind. But after reading some of your comments, Sam, I see there's a deeper reason why I was disturbed by it.
I'm against fans just wanting something for the sake of wanting it. I'm especially against fans creating entire groups specifically for the sake of hating a character. It's one thing if the character is legitimately bad and detracts, rather than adds to, the comic; but the usual reason is just because a particular group of fans don't like the character because said character interferes with some favored relationship. And the sad part is that it is usually the female characters that get the worst brunt of that - I see no one forming "We hate Sonic" groups because they want Sally to end up with, say, Rotor or Big the Cat (insert someone posting fanart of either of these two in the next post or so). But there are plenty of groups that hate Sally, hate Amy Rose, hate Fiona, hate Mina - female characters who all have their personal followings, both for good and bad.
And maybe I'm wrong, but I get the impression that many female fans are part of these hatefan groups...which is kind of disturbing to think about.
But that's more of a commentary on the fandom rather than the comic situation itself, which I think Sam and others have discussed in the other topic at length.
What they said, to both this and the Sally punch scene.
In addition, even if you want Tails to beat up Fiona, that is a totally inappropriate interpretation of the idea. If he did it, that would be a fight scene, not some kind of horrible ambush like the fan cover suggests. She's not fighting him back. It could be interpreted as crying for mercy. That just makes it a creepy 'brutalize the ex' fantasy.
The only excuse for the official scene is that it's taking place in a universe where people battle frequently and firing machine guns at an opposing team is considered 'just a way to scare them' (at least by Rouge and Omega).
This is all kinds of messed up.