(if I only care about looking at pictures of LOLcats, I might be 'neutral to the rest of the internet' except for taking a little bandwidth. A superpowerful AI might realise that it would slightly increase the upload speed and thus maximise the utility function if vast swathes of other internet users were dead).

Dead and hilariously captioned, possibly.

I bet such an AI could latch onto a meme in which the absence of cats in such pictures was "lulz".