[jhanschoo]

Much punctuation evolved organically from scribal shorthand. On the internet, I can see a contraction of /s into a symbol being one of the likeliest candidates for turning into punctuation.

[justhackedme]

And that's as formal as someone being labelled a 'troll'.

None of the internet's fads or memes deserve to be preserved in punctuation rules. This is a joke.