This is the proper approach, to go through the hierarchy as the quote posted by Brendan from RS indicates.
IMHO, public criticism of the clergy is not only improper, but divisive and hurtful to the Church Christ established. Jesus himself told us to be obedient to those in authority, even if not following their example.
According to the gospels, those who lead God’s children astray will have their own special reckoning with God. We are called to be obedient, while making our concerns known through the chain or command.
If nothing else, publicly posting allegations that have either not been proven, which are personal opinion, or which may damage someone’s reputation at the least border on slander and/or libel, especially when we start seeing words like “dissent” and “heresy”. Keeping in mind James’s clear admonitions about how we use our tongues, it would seem to me that the correct Christian approach is to proceed as RS instructs.
Peace,