No, I am NOT advocating to my self-defense students that we consider this a viable self-defense weapon.But self-defense does take on a different timbre in other locations.  Such as Libya.Souad Soltan, a congresswoman in Libya, carried a hand grenade for self-defense.  It was found via metal detector as she entered Tripoli's City Hall for a meeting.  It was confiscated.  On her way out she asked for it back, claiming she needed it for self-defense.  Her request was denied.  I don't know if she's since replaced it with another, or with some other weapon.Check out this article on why she's carrying that grenade.There are several pros and cons for her choice.  First, she's only got one chance to use it.  It's blast is indiscriminate, so she or bystanders could also be injured.  And it will only go as far as she can throw it.  On the positive side, it seemed to fit well in her handbag, and it could take out a number of attackers at once (which probably was why this is her weapon of choice).Your self-defense will look different in different places.  Since the fall of long-time ruler Col. Quaddafi two years ago, civil protection has weakened.  More people have access to weapons, and some are using those for harm.  Anyone involved in politics is someone else's target.  Your precautions under those circumstances not be as carefree as most of us in Seattle (where it is common to cross a street while staring down at your phone).And carrying a concealed grenade is probably illegal in Washington State.  So don't do it -- there are better options for you.