It's civil disobedience, at least once she refused to step aside when told to do so by the police officer. (I don't know if she was breaking the law by obstructing the robot.) So yeah, I would say there is nothing inherently wrong with you obstructing the entry of the local library -- provided you are willing to be peacefully arrested.

That doesn't mean that I agree with your right to obstruct entry into the library, nor does it mean that I agree with your reasons for blocking entry to the library. I also suspect that the courts would reject your reasoning.