The ACLU's sole purpose in life is to get court precedent. That is why they sue all of the time. They have lawsuits coming out their ears, and they lose most. But, if they can get some idiot judge to agree with them one time, then any case or related case can be used by other judges as precedent. There is no free speech protection regarding a timeline of squatting on public property if there are other means available that do no infringe upon the health and security of other citizens. The occupy movement is the fantasy of revolution from past revolutions of the proletariat. They wished they lived in 1917 in Russia.