By the way, you misspelt "singable", "Pratyush", and "Prahar".

user10001 is the same as dushya. Also, Pratik Dioghare is no longer active.

I mean, you misspelt "pingable", as "singable". Not that I know how to spell "mispelt" : )

Also, Lawrence B. Crowell, under the list of people no longer active.

If Physics.SE is to fail, getting the individual data dump would be much easier.

Maybe the ones who are not pingable are at least singable, such that I can reach them by singing at them ... :-D? Note that my singing abilities are not that bad ... ;-P

Oh my God, it seems he has even silently deleted his account, he was very nice and has given tons of immensely nice advanced answers, to me too ... When klicking un users and then searching for "Crowell", it is only Ben Crowell's profile that still turns up. I can not imagine that Lawrence B. Crowell has simply changed his display name, he was a very serious theoretical physicis…

Seems Pratik Diaghore has deleted himself too ...

He didn't delete himself; he just left: http://physics.stackexchange.com/users/126/pratik-deoghare

What? I remember he answered one of Lubos's questions; I'll check Lubos's profile... Oh, no, he's here: http://physics.stackexchange.com/users/1352/lawrence-b-crowell

Ah ok, so I probably did not find him by the search because he is unregistered ...