When I was working for Big Blue, I - along with another employee - were told that, due to a lack of local work, we'd have to travel to another city and work there. My co-worker said that she simply couldn't do it, so she was let off the hook. (I have no ill feelings towards her - her husband travelled a great deal for work, and she had a little boy who was only about 6 years old at the time. She had every reason to say that she couldn't travel.) I had no such excuse, so I was sent to Scranton, PA. Worst five months of my life, but that's a different story.
When I finished that assignment, I was told that I would have to travel again. I practically cried, and I told my manager "It was a horrible experience, and I missed my husband and small children (who were 5 and 3 at the time) dreadfully. Please don't make me do that!" My manager said she understood, and I thought that was the end of it - until I got a call from a very nice man in New Jersey welcoming me aboard their new project. Um, what? I told him politely that there must have been a misunderstanding, and that I wasn't going to be on his project. He seemed very puzzled, and I soon found out why - my manager had ignored everything I'd said and signed me up for that project anyway. I would've been away from home for months - again.
Shortly after that, I was laid off. So, you could say that I committed PD. I couldn't help but feel resentful, though - my co-worker was let off the hook because she couldn't travel, but apparently hating travel and missing one's family wasn't a good enough reason to say "no".