I've talked with a lot of DNC guys I've worked with over my time in politics. Not high-level people, but people with track-records and guys who do the grunt work - canvassing, phonebanking, GOTV efforts, awareness campaigns, that kind of thing. Literally almost everyone who gets involved with politics, regardless of income, will wind up directly being involved with politics at first in this fashion. Most of 'em are volunteers.
That said, my admittedly limited contacts turned up fucking nothing, and I had the one contact I have whose actually pretty politically-connected look into it. If Brianna Wu, during her time as John Flynt was at any point politically-involved, it either wasn't as part of a DNC effort or was something so small or fringe that it didn't even get attention from the powers that be, analogous to the infamous chair incident I mentioned in the Gamergate thread.
I'ma take a shot in the dark here and suggest it was a chair incident analogue. You heard it here first.