But it hurts us, too, when they assume we use Word and send us (or demand that we send them) documents in Word format. Some people publish or post documents in Word format. Some organizations will only accept files in Word format: I heard from someone that he was unable to apply for a job because resumes had to be Word files. Even governments sometimes impose Word format on the public, which is truly outrageous.
For us users of free operating systems, receiving Word documents is an inconvenience or an obstacle. But the worst impact of sending Word format is on people who might switch to free systems: they hesitate because they feel they must have Word available to read the Word files they receive. The practice of using the secret Word format for interchange impedes the growth of our community and the spread of freedom. While we notice the occasional annoyance of receiving a Word document, this steady and persistent harm to our community usually doesn't come to our attention. But it is happening all the time...
(Ричард Столлман, 2002 г., http://www.gnu.org/philosophy/no-word-attachments.html)
Подписываюсь - особенно под вторым абзацем.