Whatever the case is, I don't think a public crusade is the right option. If he had conclusive evidence of him cheating during the match, he wouldn't have made such a protracted statement on it weeks afterwards.

In Magnus' statement he specifically spoke of how he felt, Hans felt. This shows how much information beyond the 64 squares that chess players take in.

I'd argue the opportunities are larger in chess, because "what to do" is much more concretely correct.

Bridge has its own problems... and people will cheat as long as there are physical devices. (Fantunes / Fisher-Schwartz) Imagine if they used any simple encryption algorithm, they'd be fishy, but impossible to catch at that time.

BBO is the future for bridge IMHO.

Chess, will become an in person game with nobody else but the arbiter, players, and cameras in the room.