Wow, what an interesting saga. I didn't follow it closely, since I didn't have a clear image of Reveille, but I thought it was sweet and touching that this site would rally in support. On the other hand, I have become suspicious of the value of investing emotionally with semi-anonymous strangers. What makes this case interesting is that he had met with others face-to-face and had presented some version of himself. Nonetheless, it should be recognized that on the Internet or in real life, only time, experience, and thoughtfulness can build a true friendship.
It is likely Reveille is a disturbed or at least unhappy individual. It is almost certain that these activities did nothing to dispel his unhappy feelings. From that standpoint, I cannot imagine what purpose would be served by further engagement. On the other hand, I cannot imagine what purpose a permanent ban does that a six month suspension would not. If he chose to violate this suspension, there would be more than adequate justification for the ban. But assuming he chose to honor it, he could conceivably return at a later date. I don't know what purpose might be served, but I also do not see the harm. This is, as has been said, a community, and while I can pragmatic and just reasons to suspend him, I cannot detect what the community gains by refusing to engage a hypothetically rehabilitated Rev at a later date. Perhaps that is something that could be addressed by the mods via email, but I like the idea of a rehabilitation process being in place that requires no soul-searching, only patience and willingness.
As for future policy... I find it difficult to identify what about this hoax would distinguish it qualitatively from a more common prank. It is important to distinguish what happened in more than degree, to say what about it specifically was wrong. I can see two defining features. First, it is non-topical; it has nothing to do with games or gaming or the like, but rather, with a dramatic story about one person. If it were a real-life event, there is no problem, but as a prank it is ultimately a waste of bandwidth, friendship, and attention on a gaming site. That is an adequate rationale for saying this is different from the common (or not so common, but benign) prank. Second, it is uncivil, in that loss of life can be discussed lightly but should never be held lightly. I will not disallow the possibility there is a funny coma-related prank that could be enacted, but I have trouble imagining what it is, and I think this and similar topics can be considered generally unsuitable. In this case, it was clearly a disturbing and provocative use that distressed many people. Both distinctions have everything to do with intent and not so much with form.
I do not wish to see a policy shift. There is nothing productive to be gained by having the mods sniff every request-for-prayers post for mischief, and much to be lost in goodwill toward others. I am fine with the occasional hoax. I am ok with being had, for so cheap a price. Similarly, I would not like to see such posts be met with pages of speculation. I think it's enough to accept things at face value and permit them a reasonable level of discussion, until such time as the post submits evidence of being a hoax. It is better to be tricked, than to withhold compassion, and better to be a site that is too-trusting than one in which charity of spirit and well wishes are forbidden.
It might be worthwhile to have a thread in Meta that simply links to known hoaxes. This would serve a historical purpose, as well as fostering a reasonable level of caution and skepticism, without encouraging pessimism. It would say, "Yes, this does happen." That's all that really needs to be said in the long run.
I feel badly for the people who felt close to him and were tricked. I feel badly for him, too, and I hope he comes to recognize a path to interacting positively with others. I have the benefit of distance from this situation. Not to make light of the distress others feel, but I can see a positive side to this. It is a bizarre and one-of-a-kind story, an opportunity to experience the world in a new pattern, and learn and perhaps even, in time, to laugh. Truly, each of us is a miraculous, unique creation. Today I celebrate that I have now read about a thing I had little notion would occur only a few days before. I don't know if we can all laugh about this some day, but we can certainly apprehend it with amazement and confusion.