I think it's obvious what he means, and you're probably just being difficult. It's a joke because it's a threat 1) over something incredibly trivial, 2) over s

I think it's obvious what he means, and you're probably just being difficult. It's a joke because it's a threat 1) over something incredibly trivial, 2) over something that is never associated with death threats (i.e. command-line arguments), 3) done by someone who presumably isn't normally associated with death threats (i.e. a nerd), and 4) that was submitted to the microsoft.com feedback form, an absurdly broad audience if this was intended to be effective.