I know Calibre can remove DRM, but it seems that Calibre does not remove things like watermarks, references to the buyer by name, etc. Now maybe I can try to find those manually, but that is an error prone process. Plus, what if they embed a unique digital signature that ties back to me? I understand that this is a very uncommon practice, but I do not want to find myself in a bad place.
I suppose the only way to remove a digital signature of any sort is to buy two of the same e-book by different people, diff them, and remove anything that differentiates them.
Is there any tool that does this or automates the process? am I being too paranoid, and this is not a real threat?
Just use calibre to change the format to rtf or even txt, and then back to mobi or epub, and poof.
Neither of those formats store any significant metadata, with rtf the original formatting gets preserved though.
This is such a bad idea! The formatting will be lost and the resulting document will look like shit! Especially for books where they use graphics.