If I’ve understood correctly, he’s merely saying that a Dementor-killing spree would be stupid, not that Harry wouldn’t necessarily do it. It’s consistent with Harry’s take-no-prisoners mentality—as he says, “If trouble comes of it, let the Light win again.”
That seems to be the consensus #1 and #2 options, yes.
Consensus # 2 is retarded, says word of God.
Though a bit more politely than that...
If I’ve understood correctly, he’s merely saying that a Dementor-killing spree would be stupid, not that Harry wouldn’t necessarily do it. It’s consistent with Harry’s take-no-prisoners mentality—as he says, “If trouble comes of it, let the Light win again.”
Pretty much this. It’s a bad plan, but it’s more likely than all of the other deeply stupid plans we’ve discussed.