Privacy and HD Public Keys per Contact

[bitmarley]

Perhaps Bitshares could include a feature to generate a special HD Public Key which they can provide to each unique contact to maintain privacy to generate an infinite number of target addresses for payments to you. That way your privacy is better maintained. Ninki calls this "Air-gapped Address Exchange".
http://ninki.ghost.io/2015/03/17/ninki-bitcoin-air-wallet/

Problem for bitcoiners is that all your contacts must have the Ninki wallet to get the features. It may be a long while before other wallets start to incorporate the feature. Since bitshares it just getting started it could be included in all wallets by default.