Authentication of the web site operator Web sites can misrepresent their policies. Web sites can make false promises of how they will use the personal information collected from users. Web sites can misrepresent themselves. Companies with less integrity may claim erroneously to be another company altogether, or a subsidiary of a different company. P3P does not provide for secure means to store information.
Web sites can request additional pieces of information.
It is possible that many web sites will request additional items, and thus inundate the user with many prompts to fill in such information. There is no regulation as to this process, but again, it is in the best interest of web sites not to needlessly trouble the user, because the user ultimately may choose not to use P3P at all. The user might be faced with filling out identical bits of information for different web sites. However, there are ways around this, namely improving the logic in the browser to check for similar bits of information, or making it easier for web site authors to re-use names that are commonplace. Deploying P3P Globally.