SD emailed me a few weeks ago after disappearing for about ten years or so... I invited him to post here to test that technical ability and he did. I invited him to review some of the ideas here but I don't know if he did or not because he disappeared again. This is typical behavior of those who did not like my writing about cryonics. They would appear, and in the past, attack, and then disappear. SD's email was friendly this last time but he/she disappeared again. SD is an acryonym for "shipdit", a reversal of "dipshit" which is a self-assigned nickname by him/her. It's well deserved I think. SD was a always an unfair poster on Cryonics Cafe as I recall, although it's difficult, but not impossible, to access those posts today.