I don't know whether there is any truth to the Chinacat, probably not as magical as it appears to be. But it's still an interesting read, if all of it isn't truth I'm sure some of it is. But like every chemical, it's down to the person who synthed it how things work. 20 miles away there could've been someone making some cid in a completely different approach/manner, for complete recreational usage.
If Chinacat and his friends didn't do a thumbprint I'd be confident in saying someone either has in the past or someone has as a result of the story. If someone had a lovely vial of crystal LSD, took it a bit too often and lost the plot or even just got adventurous as many of us do, I'd say at some point or another they'd throw a big wack into the palm of their hand just to see. Might not be in the best mental state to do it, but I've heard of it happening in this city alone at least 3 times, not a thumbprint dose because over here I doubt anyone will be seeing crystal, but when it comes to blotter some people just loose the plot and eat a shit load. I'm not too sure about the lingering effects though, anyone I know of who took acid in high doses has only had mild HPPD (if you'd call it that) for a few weeks/months afterwards and that can be gained from tripping once a week too, I call it perception change. Although, a friend of mine did once begin eating a good 1mg dose at minimum of LSD on a regular basis and due to his lack of consideration of his mental state made his psychosis even worse and began to hallucinate like he was coming down off a crystal meth binge (thought riot police were in his room taunting him, etc).