The problem with classifying this event as censorship is the subjectivity of the argument. One can propose that an individual is a subject of a government whose sole purpose is the malicious discredit of unfavorable information pertaining to that particular government's desired propaganda, but we can also propose that this particular individual believes that government conspiracies to undermine the public opinion on internet forums seems irrational.
I think we can all agree that both are entirely feasible, but remain unable to provide substantial evidence that discredits the other.