I can't speak to the facts concerning most of these threads.  I, however, was the victim of a smear attack by quickseller in which he deployed an alt to troll me and then dug into my past until he found a false accusation by a known scammer (from years ago) and then used it as a reason to neg-rep me with his main account.  He did this in a (failed) attempt to get me kicked out of the signature ad campaign I was a part of, presumably as vengence for crossing him in public (ie, calling him out for his hotheadedness and suggesting that calling people idiots is not called for).  That's my experience with him, as to the rest of these threads, you'll have to take them on their merits, I think.

I've disagreed with Vod in the past many times regarding his enforcement of Microsoft policies and intellectual properties.  Three striking differences between Vod and Quickseller which I notice are that (1) Vod maintains his cool and doesn't resort to name-calling and mudslinging when people disagree with him; (2) Vod actually removes negative trust when people talk with him about it (ie, he doesn't try to hold people's pasts over their heads for all time); (3) Vod doesn't seem to go on vendetta missions in which he's going to give negative trust to anyone who disagrees with him (if this were the case, I'd have negative trust from him since I don't agree that Microsoft policies should be dictating trust ratings on this board).

The other thing to keep in mind is that quickseller is a known account farmer/seller so in adding neg-reps to accounts, he's actually driving up the value of his non-neg-repped farmed accounts.  It's a black and white case of conflict of interest.  http://en.wikipedia.org/wiki/Conflict_of_interest

As far as I know, Vod has not been associated with any such behaviors.