Nani zoku?

[Mahoujin Tsukai]

As far as I know,

海賊 - sea pirate
山賊 - mountain theif
盗賊 - thief (I see this alot in JRPGs)
空賊 - an air pirate (term appeared in a Final Fantasy game)
宇宙海賊 - term used for space pirates (fictional)

What would be an suitable japanese word for an Internet zoku? That is a thief in cyberspace today. Netto zoku?

Any popular terms being used by students in Japan today?

 

[yasuyuki]

...Maybe hacker(ハッカー) or illegal downloader(違法ダウンロード者) is the word, I think,
but I'm not exactly sure what a thief in cyberspace does...
And if I was a SF mania, I would make a word like "電脳海賊" using Chinese words.
But, anyway, I don't know this is what you want... sorry

 

[Mahoujin Tsukai]

I wanted to know what kanji (if any) are used for an online 賊

 

[undrentide]

I wanted to know what kanji (if any) are used for an online 賊

You can coin a word with 賊 if you wish, but there does not exist such a word in kanji, as yasuyuki mentioned.