The problem - I think - is that since SR cannot offer support or protection for BTC-buying transactions (like this one), they can't really use it as "proof" that a vendor is scamming people. Before they can ban a vendor, they have to have proof that he is scamming people, and I'm not sure if they consider "proof" from a transaction that they already have clearly stated they do NOT offer support for. Not sure, but I'm still hoping they will ban him if multiple people have been scammed.