Very interesting perspective. Of course it can never be completely anonymous as mentioned by @thelogicaldude. How would a vendor deliver your purchases to you without an address? So I guess there needs to be some sort of co-operative relationship between vendors and buyers whereby there is a contractual agreement not to link address and wallet together in any vendor databases/systems and/or to delete such temporary links, if necessary, within a certain period of time eg: by the expiry of any statutory returns date. Thereafter, the only party who may legally retain the linking data is the buyer. The buyer and his/her wallet would still remain anonymous on the blockchain.