Lady Finger 4

LF4, a Neopets user commonly spotted on the FC (the Fan Clubs, a Neoboard), spiced up the boards by linking a series of userlookups and petpages. Together, LF4 (username: ladyfinger4) and a few other users with strange, numerical usernames, posted all kinds of weird babble on the Neoboards. People rushed to 'decode' it, even interrogating the users at one point. All in all,
the whole thing turned out to be a frickin' hilarious ( and fun) 'hoax'.

Since then, Senders (death threat senders on the boards) have mimicked LF4's techniques (the number-babble the users called "codec" or "code C"). They were...less than successful?