Suppose I selected from among all physicists who accept MWI and asked them what they thought about FAI arguments. To me that's just an obvious sort of reweighting you might try, though anyone who's had experience with machine learning knows that most clever reweightings you try don't work. To someone else it might be cherry-picking of gullible physicists, and say, "You have violated Beckstead's rules!"

Just to be clear: I would count this as violating my rules because you haven't used a clear indicator of trustworthiness that many people would accept.

ETA: I'd add that people should generally pick their indicators in advance and stick with them, and not add them in to tune the system to their desired bottom lines.