What an extraordinarily useful "Heads-Up," and seriously so.

I certainly wouldn't want to muddy up the discussion with any too off-hand speculation, but if one may endeavor to extrapolate as towards any application of this knowledge: In noticing that each transaction e.g at Kraken might be, to any extent, publicly - though anonymously - advertised at least via the Kraken web API -- perhaps, with some exceptions?* -- and there may be some fairly novel, if not altogether technical things found online as with regards to any manner of a system of material provenance, ostensibly applicable as towards a manner of a data forensics, namely as among developments of a sort of a Semantic Web standards-making community -- e.g the PROV-O ontology developed in the W3C standards track -- moreover, in considering the essentially transparent though immediately anonymous nature of transactions onto the Blockchain, in short, I believe that the Blockchain is already doing a lot of the book-keeping, itself? Sure, it doesn't all bridge the gap onto individual identity, but I believe it's not as though anyone was trying to keep any Bitcoin transactions "Secret" altogether?

I certainly wouldn't want it to seem like a "Buzkill" that so many transactions on a Blockchain may be already publicly advertised - as may be necessary to the authentication algorithms applied throughout the numerous finite state machines that make up the quintessential "Bitcoin System". I believe it could pose a concern as with regards to data mining, as such, but hopefully such a concern may never develop too tall of a shadow in the Bitcoin community?

Considering that an AML/KYC burden must be legally and somehow shared as a responsibility, shared as by any hypothetical Bitcoin exchange broker extending of any single Bitcoin exchange's own material services, I would like to speculate that it could be - in any semantics - leveraged onto the trust provided/developed by the individual Bitcoin exchange institution? There are some concepts of a Web of Trust, developed in some IS/IT practices?

I believe that the initial post serves to elucidate so much of a legal side of running a formal, commercial service onto a Blockchain. Certainly, it's not all about Unicorns and Silk Superhighways, LoL?

* Maybe not as much publicly available about the "Dark" Bitcoin/altcoin currencies though?