Nor did I initially but having been given some background info by a relevant party or two I can now see precisely why the very, very strong suspicion is there. Will leave it to such parties to pubish said info in the public domain should they wish.
I'd like to add that if true - and I think the possibility is strong indeed - I'm incredibly annoyed as Precambrian's a poster I got (eventually) to have a huge amount of time for and thought he was great for the forum. Really annoying that he got banned for a such a silly, unneccessary incident; more annoying still that he couldn't wait a week without duplicate-accounting so thus got 7 days extended to 28; and yet more annoying still that he's apparently created another duplicate, ensured no certain (IP) detection is possible and posted in an unutterably woeful manner (this susudear's early posts were diabolical TSTL) presumably just to reduce further the possibility of detection.
Initially I'd never remotely suspected susudear of being Precamb (though I was fairly sure it was some form of mult33, and of course as I say first presumed grapedo) but having studied the matter further and had a few other things pointed-out to me, I do think it's quite likely.
Let's just hope Precambrian returns eventually and returns with his normal account, and as himself.