I don’t know Fr. Miller at all, but the anonymous poster is the real scandal here. If you have real proof then expose him, if not, keep your backbiting mouth shut. Remember, you will be held accountable for this if these accusations aren’t true or are exaggerated.
In this day when perverse priests seem to run rampant in independent circles, it seems charitable to warn people.
I assume a religious would be careful not to say anything against another religious unless he had pretty concrete proof, for he/she will be judged more harshly than laity.
I understand why some refuse to attach their name to their warnings. Perhaps they fear being sued as Mr. Pfeiffer was sued by Pablo the Mexican who is with Fr. Pfeiffer (no relation) and runs OLMC, using OLMC donations, over his statements (all of which were already online) regarding his warnings to the Faithful of Fr. Marshall Roberts (Fr. Mary of the Pillar) who is working with Fr. Pfeiffer and is stationed in either Portales NM (last I heard) or Arizona (possibly both). Even if the case is thrown out of court, it is still quite costly and time consuming.