According to @adam3us, a well functioning Bitcoin BTC layer-1 privacy mechanism would make anti-spam filtering information-theoretically impossible (source: @adam3us on X, Oct 12, 2025). He adds that even the 2013 committed transactions proposal would have the same effect, defining a protocol constraint traders should consider when evaluating potential Bitcoin L1 privacy upgrades (source: @adam3us on X, Oct 12, 2025).