I think this might be a hoax. After all these years Roberto Carlos and Ronaldo vex ? It seems a bit unlikely to me. In Pele's case, he's always expressed that he never really liked the name. He said when called him 'Pele' in school he was very annoyed and would often get into fights for it. Pele's comment seems to be too offensive to believe. But he too has benefited from the 'Pele' brand.
Ronaldinho (Gaucho is not even his real name it is nickname ascribed to people of his region of Brazil. There several other Gauchos.) would never make such a comment since he has lucrative deals with nike and a change of name would mean a significant investment into the rebranding of the player. If it is true nike will quickly shut them up.
iwanted to say this with my original post as points but forgot......
Itwas the pele part that would make it serious AND i happened to be reading an article with that fact just before.... but at least it was already mentioned here.