Are sequence numbers of messages taken into account at all? I.e. always order messages from the same feed in sequence number order, use timestamps to establish an ordering between two messages from different feeds?

The cheeky quips are totally fine, it's not like I haven't been handing out a lot of them myself over the past few days =P I feel like I should mention though that timestamp randomization can have benign motives, such as anonymization of timezones (and computer activity in general). You might trust your immediate peers not to keep track of when they received new messages from you, but you can't trust any future crawlers of your immutable log. At some point, there will be communities of people who want to keep that information private, and they would have to chose another client (and also they'd be isolated from more privileged communities).