Only under controlled and regulated circumstances.
I can see I’m in the minority here, which is fine, but I’ll again go back to my core philosophy. Individual rights should always be protected. My ability to protect myself with a handgun or rifle doesn’t affect you, unless I choose to break the law and use the weapon in a manner that’s not legal. I shouldn’t get a say in whether you defend your family.
But explosives can impact others. The handling and mishandling, especially by private individuals in residential areas can have consequences that extend well beyond that individual.
And again…I’ll ask…what purpose does a hand grenade serve for legitimate self defense unless we start to include dystopian and post apocalyptic scenarios?