Actually, I was surprised that some movements decided to use that word to describe themselves. I believe that 'occupy' is very unfortunate word, especially in Europe. For example I live in a country that was occupied by the Nazis in 1939 and by Russians in 1968 (that occupation lasted 20 years). The meaning of the word occupier basically equals to 'the one who takes freedom of others by force' here. If you use that word to describe yourself or your movement you can be sure that most people will automatically be against you from the beginning. Not the best PR move.