As SAFE does not need logins to join sites etc. (it can handshake keys etc.) it allows significant ease of use, however it allows aggregation of data between sites (bad sharing). A very nice (and also very doable) addition would be to include SQRL into the mix. This would allow unique ID’s per site, but still automatic to users. See https://www.grc.com/sqrl/sqrl.htm here for a backgrounder.
This would make a great RFC for an upcoming sprint (does not need to be pre launch so no rush). If anyone wants to jump on such a feature it is not that hard as all the pieces are in place for this. Seems like a neat addition to ensuring SAFE stays SAFE from the darker side