If a thread is one of the top google results for a question, i'd rule that its not a necro. It is a public resource now.
I guess in PFS even the rules have rules but if I were the DM i would likely make my own decision based on party balance rather than on the rules. For a 2h power attack barb who is just trying to beef up damage i might rule no, despite the raw not saying no, to help keep other players competitive. If the player were a 1h+shield barbarian i might say sure just to help keep the barb competetive. Naturally i'd discuss such things with the player in advance to avoid making wasted build choices.