That's not a "lie". I post right on my site that I have a belly ring, and it is clearly shown in EVERY nude or semi-photo, video clip and DVD I've ever been in.
If someone who frequent a porn forum places a single, small belly ring in the same realm as multiple piercings - nipple rings, clit rings, nose rings and all the other porn clichés - well, that's pretty sad. But the simple fact is, most people get it.