Or it's not Riddle at all. I was writing out a whack of reasons for this, but there is no need: Eliezer has spoken:

I've edited the birthdate of the person Amelia refers to, to be 1927 - too many people were interpreting that as "She thinks he's Tom Riddle" despite the House incongruence, an interpretation I'd honestly never thought of due to Illusion of Transparency.

I can also make the testable prediction "The universe will cease to exist on May 19th, 2034 at 10:03:09PM", but unless I had some truly excellent supporting evidence which I posted along with that prediction, I would not expect people to think well of my statement (particularly if I made it in a rambling, melodramatic way that made it difficult to determine the purpose of the post).

Likewise, when you go from growing plants to feed a cow to feed a human to growing plants to feed a human, you >reduce the amount of plants necessary at least tenfold,* which similarly sounds like a tenfold reduction in the animals >killed by farming processes.

This is the main motivation for many vegetarians, from an energy reduction perspective. Ten times (approximately) more plants means ten times (approximately) the energy taken for the same amount of food/energy for the consumer.

It trends forward every day, eventually wraps around

This sounds a lot like Non-24-hour sleep-wake syndrome. The defining symptom for Non-24 is (from Wikipedia) "a chronic steady pattern comprising one- to two-hour daily delays in sleep onset and wake times in an individual living in society". Your delays seem to be longer than 1-2 hours, but it may be a similar problem. I don't know how much you've looked into this, given the impressive extent of your other searches, but it may be something to look into.

Have you tried light therapy? Wikipedia (and this study) recommend it, perhaps in combination with melatonin, as the most effective treatment of Non-24.

Not sure how valid this is, but it might be worth looking into, if you haven't already.

Once the group is a little more established, a private venue (someone's house) might work best. Completely dependent on whether or not people have large enough houses in the right neighbourhood (and are willing to put up with us).

What if it just kept the first three (or so) letters of the login name? The chances of two people with the same first three letters discussing the same thing is, while not infinitesimally low, well within acceptable limits. If you knew the person before deletion, it would let your recognize them, but it would keep their name from turning up in searches (the main reason, that I know of, for deleting accounts).