I've done a bit more reading on it, and I understand the arguments on both sides.
I guess my major question mark is just how much abuse are you supposed to tolerate before resistance becomes excusable? Is there ever such a boundary? Leaving it up to the courts to make things right after the fact, and resigning you to complete powerlessness in the meantime is just such an easy tool for a corrupt institution to abuse... and they do. For instance, Occupy has been somewhat immune/exempt from this due to its broad scale and indefinite duration, but the single most common police tactic at other protest events is to simply mass arrest people on fake charges, hold them until the event is over, then drop the charges and release them. Often, relevant parties will donate to the city in advance to cover the legal fees, so that those who choose to go to court over their treatment are simply paid their settlements. Besides the implied absurd notion that prevention isn't a priority because any kind of wrongdoing a person might suffer can be made right by throwing money on it after the fact, it turns violating people's rights into an easily measured cost that can be managed like any other...
And I don't like the argument that it's to protect the police from irrationally violent responses, either. Danger is their job. They accept the risks when they accept the job, and get paid for them. Why does the law put more effort into protecting them than into protecting citizens from potential abuses by them? An ordinary citizen did not volunteer and does not benefit from being put in a dangerous position. The burden should be on authorities to take the maximum amount of care to keep matters honest and civil, and I can't think of any more effective means than to make that a matter of their safety.
Edit:
This cheered me up a bit. A reporter for the Daily Caller, a publication that has so far been demonizing the protesters, has apparently changed her mind about them after she and her cameraman were attacked by police for being obvious journalists and protesters moved in to help.