if it is hidden by enough active members, then maybe the post gets flagged for review
But that is open to abuse by people who can maintain 'active' accounts for this purpose (by for example posting utterly innocuous things on unrelated boards)and contrary to freedom of speech.
We don't know what the criteria are but at least at the moment the mods appear to have a discretion, whether we think that is being exercised fairly or not. A system of X hides leads to review/deletion gives a power to the bullies and it will be abused..
As the judge said in the FairCop proceedings this morning, freedom of speech protects the right to be told things we do not wish to hear.
A hide function isn't good enough for some people. It's not that they can't bear to hear it. It's that they don't want others to.