I see this come up again and again on HN and this kind of logic keeps getting voted up:

"You're complaining about [lesser evil] when there is [bigger unrelated evil]. Therefore what you say is irrelevant."

Sometimes it takes on this flavor:

"You're worried about the well-being of [one person] when millions are starving every day. Therefore what you say is irrelevant."

Is there some sort of fallacy name for this? This kind of argument says nothing.