This news has been around for a couple of days, but...

Open Whisper Systems was subpoena'ed for user information. They complied, but the only information they keep about users is the date/time of registration and last date of connectivity.

I think that's pretty great. I'm not sure that that could be true of the implementations I'm writing. I guess it depends on whether or not you use transient messages (which are supported by ActivityPub... you can use fragment identifiers where the fragment is a uuid) or something else. Though the implementations I'm writing currently are tuned for the "your server holds information for you." Maybe it's a feature to aspire to.

Probably also though, it's indication to me that the best situation is to not host information for other people. If IPv6 were in better deployment and ISPs weren't as crazy as they are now in their terms of service, people could self-host from home much more easily. Anyway...

Thanks also to the ACLU for helping Open Whisper Systems remove the gag order and talk abou this!