I make presentations using a latex class (powerdot) that gives as
output a .pdf file, and often I have to present it using computers
running windows in which there is only Acrobat Reader installed, so I
want to be sure that everything is ok testing it with this "polluting
closed source software".
Of course I could ask the organizers of the workshops where I am used
to show my presentations that I refuse to attend if they don't provide
me a pc running Debian or Knoppix, but this seems to me not feasible
at the moment...