I haven't heard of the story before, interesting read, thanks!
I think the thief should start sending small amounts to random active addresses, even member addresses found on this forum. That will make the number of address to monitor explode exponentially.
And why in the world would the thief do that?
To bankrupt or confuse the pursuers? After all, they can't keep sending and monitoring those 0.00666 BTC tracer transactions to every active wallet.