http://matrix.org/docs/spec/#m-room-redaction http://matrix.org/docs/spec/#m-room-redaction is the current API for removing messages. Matrix uses namespaces fo

http://matrix.org/docs/spec/#m-room-redaction http://matrix.org/docs/spec/#m-room-redaction is the current API for removing messages. Matrix uses namespaces for extension to survive mutual parties extending it (http://matrix.org/docs/spec/#events http://matrix.org/docs/spec/#events), and we haven't seen any problems there yet. That said, Matrix is still beta and we certainly do have a whole bunch of other problems :)