There’s no question: Duff McKagan should not be fucked with.

Being a part of Guns N’ Roses, one of the greatest rock outfits of our time, one would have to have some inherent fiery edge just to survive. He’s battled addiction and Axl Rose, and now he’s battling conspiracy theorists.

At a recent signing for McKagan’s book It’s So Easy and Other Lies, former Seattle mayoral candidate Richard Lee bombarded McKagan with questions regarding the “Cobain Murder Conspiracy.” Without allowing Duff to respond, Lee was bounced from the room and escorted off campus when the room grew tired of his bullshit.

Watch Duff be a badass:

McKagan’s book came out a few weeks ago. Check it out.