LWN: Unexpected features in Acrobat 7: "By default, Adobe Reader 7 turns on JavaScript, so the 'tagged' document is able to 'phone home' without the user's awareness. Turning off JavaScript disables the document's code, and prevents Remote Approach (or any other entity) from tracking views of the document. No doubt, Remote Approach is using features that would normally be used to submit information from a PDF form....The reader does not inform the user that information is being submitted, so users are likely to be oblivious to the fact that another party is aware of their PDF reading habits. While a user may not find it objectionable to notify the publisher, there are those of us who don't care to allow publishers to snoop on activities taking place on our personal computers."
