The fact that mass delusion is possible does not mean that a high number of independent observers reporting similar experiences are deluded--such an attitude carries cynicism beyond reason.

True, but let's be wary of what "independent" means here. Once you've heard that out-of-body experiences have been reported, can you ever really be independent any more? The terms mass delusion and mass hysteria are way too blunt for my taste, but suggestion, infectiousness, attention-seeking and bandwagon-jumping spring to mind. All alternative possible explanations must be rigorously explored for all reports, no matter how high the numbers. Just me science blood I suppose. I'd call it healthy scepticism rather than cynicism. If proven wrong, the healthy sceptic rejoices, but the cynic can only crawl into a hole.