Does the violence of Doxxing accomplish that? I see no evidence that Doxing has done anything but embolden them. For me, if I look at the actual impact of these sorts of things, it doesn't seem that Doxxing is effective at actually fighting back, and is, in fact, making things more dangerous for folks like you and me, not less. Sure we get that rush of dopamine when "Karen the Racist" is fired for her own stunts when revealed to the company, but we don't check back in within 6 months to see that these people have largely recovered.
Retribution only begets more retribution. Personally, I'm more for restorative justice - even for those we find reprehensible.
Heck if the purpose is to "defend ourselves", going the route of retribution seems counter to that goal.
As for social costs - they already exist. I wouldn't be a friend with a proud neo-nazi, nor would most people. But this level of Doxxing is amplifying that social cost to unproductive levels - and I fear it serves as nothing more than a leftist/liberal virtue signalling performance.
If a drug dealer should receive compassion because of the systemic inequities that led him to "offend" - thus deserving restorative justice, why are closet Nazi's that much different? We already know that retributive justice doesn't work, and many of us would rather see it dismantled. Is every Nazi unfixable? I think the only people that can really answer this question are Germans. (And if anyone from Germany is here now, I'd love to hear your view on this - if it worked, what didn't work, etc)
Also appears to break Wi-Fi.