But, i've just been curious about what i saw here
the user's account in the top of the page is certainly deleted
how that could happen ?? .. i can't find an answer except that DC or a Mod deleted this account for a reason or another, which is normally unusual in normal cases
also he's name is weird but i'm not sure about that
Deleting Account
1 
Deleting Account
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TimeQuesT
Yes, those are guest posts (posts by unregistered users). Of course posting without registration is not possible anymore because there are too many idiots in the internet who would just abuse this to cause maximum chaos and destruction. Take a look at the date of these posts. You won't find any new ones.

IDs of new and old users would be randomly mixed up. Currently you can see by ID how long someone is registered (low: long, high: short) which is simple, clean and good.
Everyone knows that. It has even been mentioned in this thread already. That's why I added the "not working" part in the brackets