I hope you'll understand that I don't, like, keep a notebook in which I jot down these things for future reference. But as someone who's dug in pretty deeply on both sides, I see it coming from both. And always a gasp when I mention it. Like, surely you mean it's only the other guys doing a bad thing. Also think it's a dubious distinction writing off economic actions, as if that doesn't threaten a person's livelihood.
I'm sure you're well aware of what the right has done, so I'll stick to the left. Just some quick Googling and going down the list.
http://skepchick.org/2014/12/why-im-okay-with-doxing/
https://www.reddit.com/r/KotakuInAction/comments/2iwf40/compilation_of_harassmentinsultsdoxxing_from/
https://en.wikipedia.org/wiki/DeploraBall (Under Protests)
http://theralphretort.com/doxx-attempt-ends-badly-for-4chan-sjw/
Going back to the free speech that cropped up earlier, it seems as if lately it's more "free speech, but only if it's something I want to hear", which strikes me as dangerously insular and prejudiced. Feels as if I'm too-often just playing devil's advocate or something depending which community I'm participating in at any given time. Also a reason why I try to keep politics off my social media since my vocation requires a strong presence there (besides a few well-deserved jabs at Trump, anyway).
More relevant to what (I think, I can't remember anymore) sparked the conversation, also don't agree that it's somehow seen as damning to speak ill of some groups, while others are set aside as OK to disparage.