Washington, April 17 : Zac Efron and Vanessa Hudgens have put out a word of caution to their fans against phony bloggers trying to portray themselves as celebrities on the Internet.

The High School Musical couple revealed none of them were members of any social networking site such as Facebook or Twitter.

"It''s funny, everywhere I go I rep the fact that I don''t have any online presence or communicate at all online, but still there''s a couple of Facebooks and things that scrape through," Contactmusic quoted Efron as telling Moviehole. net.

The heartthrob added to E! Online: "If you have me, it''s a poser, don''t talk to him. And Vanessa doesn''t have any of them, either. None."

Hudgens, who has a 70,000-fan-following at a Twitter. com page in her name, further said: "I don''t know who it is, and apparently, there''s a lot of people who think it''s me, and it''s freaking me out!" (ANI)