I actually know I am the person in question, however, I would like a chance to defend myself.
I am not actually "serial", this is actually regarding 4 questions only out of this 311 questions on his SO account.
All the comments stated here are most likely deleted due to them being offensive and me flagging them.
If you look at the edits he wrote the wrong answer and then edited it after receiveing the downvote and then placing a comment along the lines of stating that downvoters are cowards and then calling the guy above him a coward. I responded stating that his comment was quite disrespectful to other answerers, especially Sumeet which he then responded with calling me pathetic and other such things.
Edit: He also tried to accuse the guy above him of copying, which I was quick to point out that actually his original answer was wrong.
On the other question: how to install mongodb binary package on linux
I questioned his logic in recommending to install an unstable beta version and redirecting the user to the link he actually lists as having a problem with and he began to verablly abuse me again calling me a whinnig bitch, idiot and a couple of other things if I remember right.
On the third question: How to update mongodb document
He came to my answer (yeah, I wasn't actually gong after him all the time, his answer on that question is a good one) and then said I most likely got the downvote because my answer was less than his and the OP couldn't implement my answer. At this point I noted that the OP was implementing the same answer but in PHP as his and then replied that I most likely got it because I misread the question at first. With this he wen't into verbally abusing me again, the stream has, of course, since been moderated.
On the fourth question: MongoDB - How does it avoid full collection scan?
I had some serious doubts about the accuracy of his answer which was translated by the OP as well.
Again he commited to verbally abusing me as soon as possible.
Even in Meta: Should there be a flag condition for people "changing the goalposts" on questions
He verbally abuses me and then says that I am the rude one while all I have done is questioned his logic. I am sorry but isn't one of SOs abilities is to collaberatively audit knowledge and logic as a community?
Apparently according to his last response, calling me a bitch and an idiot and verbally abusing me is being constructive.
His final response to me asking him to give me a little respect being:
Give it up. Ultimate response yes I am smarter and wiser than you. Go way young troll.
I am also disturbed that the moderators have taken his side, as he claims in that Meta thread (of which I know that moderators don't without hearing both sides):
Actually it is you who seems to be the one being offensive if you are not reading back your own response. The only person I have ever lost my temper with, I took the time to take a long talk with moderators who completely agreed.