The nationwide OWS situation can be thought of as a military encounter: The protestors are light infantry, the cops in full riot gear are heavy infantry, and the only way to win is to avoid pitched battles, fighting a war of attrition:

http://www.portlandoccupier.org/...nt-for-other-occupations/

When the Portland cops lined the square in which OccupyPortland was sleeping and prepared to evict.. OP packed up and marched randomly through the streets, getting back to the square only after the cops were tired of chasing.