https://www.icyphoenix.com/viewtopic.php?f=35&t=8932&p=58270#p58270
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Limun
Sat 16 Feb, 2013 16:00

Re: Rare Username Showed Like Link
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as i know , underlined users are baned or non active anymore
you can find them also here

btw if you click on his username you get this
[code linenumbers=false]Lo sentimos, pero este Usuario no existe[/code] 
which i think its mean in English that this user not exist 

also it can be that this user deleted account


