Seeing as it is Sunday...
Here are the reasons Bishop Williamson gives for posting in your own name (or not posting at all), beginning at 16:35
Until this time, I posted as "Seraphim."
The next day, I asked Matthew to attach my real name to all my posts.
As regards some of the reasons given for remaining anonymous (e.g., exposing yourself to harassment; etc), it is admittedly true.
But if you really believe what you are posting is the truth, then it seems to me that that is worth absorbing a bit of artillery for, and the willingness to do so would then be pleasing to God (the only thing that really matters).
There is a price to pay for being a public truth-teller (lost friendships, social alienation, seeing your name dragged through the mud by some of your opponents; etc.), but I should think myself very low if I were to compromise my integrity and not tell the truth for fear of those repercussions (or for fear of those repercussions, fail to attach my name to my own opinions).
Believe it or not, a District official once told me that he respected me for posting in my own name (while objecting to nearly everything I say).
No doubt, he found it convenient for tracking purposes.
But at the same time, all these years later, I have still not been banned from my SSPX chapel (i.e., to be respected by your adversary counts for something), for which I am grateful.
In any case, if Mossad hit squads were going to take me and Matthew out, they sure are taking their time.
Bishop Williamson nailed it: Either put your name to what you say, or don't say it at all.
Our Lord needs men willing to stand up against the rise of the tide.
Without that, not much is possible: God hates a coward.
As an afterthought, it occurs to me that all the writers I most respect attach their names to what they write.