Yes, but given that he might be tied to the horcrux network, that is strictly a more dire defeat than just letting Voldemort kill him. There is a chance his demise will poison the horcruxi for Voldemort - if they are both in there, that should obviously set of the resonance, and that is the end of the dark lord. This is useless as a strategy because if it works at all, it is what will happen if he just does nothing, But bringing it to Voldemort's attention is a loosing move.

I spent a fair bit of time thinking of things to tell Voldemort to get him to stop, but every single idea I came up with had very similar problems to that one - The only things likely to hold his attention are things that make him more of a danger to the world, or threats to his continued existence he should remain ignorant of.

Hence the lightbomb. Then either bluff that he is casting fiend-fire or deliberately trigger the resonance.