Is that comment above the bullying incident? All I see is somebody reacting badly to waking up with no rep. People do react badly when they, rightly or wrongly, feel victimised, so it is wiser and kinder to only scrutinise his behaviour leading up to his losing rep. Therefore posting that was rather disingenuous.
It's a great idea to mute people whom you find offensive but sadly the mute doesn't work and I'm not sure that flagging is the right alternative, especially since you say that you never read the comments anyway. I'm sure that people reading your posts and commenting can make up their own minds. If your opinions are valid then they should stand up well to scrutiny and contradiction.
The interaction between the two kids pretending to be cats and rolling around together could be seen as flirtatious and I believe that Skeptic meant that the boy's goofing around on the girl's level was because he he was looking at the 'bigger picture'. Having never been a teenage boy I wouldn't know what goes on in their heads and I therefore would not discount or be offended by Skeptic's theory. So why did it offend you?
You say that you aren't responsible and your stats show that you aren't directly responsible, but your gloating in your video might lead one to suspect that Skeptic is right in saying that you are indirectly responsible: by enlisting the help of others.
My take on Skeptic's tumblr video posts: is that he is concerned about kids spending so much time, unsupervised, on Tumblr. He does have a colourful way of writing but I took it as tongue-in-cheek. (He was never really going to drink bleach.)