[zosi]

O'Reilly doesn't seem to do that, unless it's embedded in the PDF in a way which doesn't show up in simple viewers.

Pragmatic Bookshelf, Manning and Packt (out of the e-books I have handy for quick checking) do put your name/address on the bottom of every page to discourage piracy.

Edit: Specifics for each publisher, for anyone who's curious:

  Manning - Name and email address on each page
  Pragmatic Bookshelf - Name on each page
  Packt - Name, physical address and purchase date on each page

[cpr]

My pre-release copy of Javascript: The Definitive Reference (perhaps because it's pre-release) does have personalization on every page.

The other (regular, relased) books from ORA don't.

[knshaum]

Downloads from O'Reilly's Safari Bookshelf, at least those in PDF format, have the account holder's name at the bottom of each page. If that's changed, it must have happened recently.