No, she was arrested for disobeying police orders. But whether they're lawful orders or not is a different matter; strongly suspect that if this went to trial, she'd have a decent 1st amendment argument, which is why it won't go to trial. (ACAB, but also this is a pretty standard part of civil disobedience -- getting arrested is just part and parcel, for better and worse.)

I don’t know why you think she’d have a 1st amendment case; intentionally obstructing public passages is a crime in PA. Time, use, and manner restrictions are widely understood to be constitutional as long as they are content neutral and do not restrict expression. If she was following behind or in front of the robot with a sign, that would be one thing, but intentionally blocking someone or something almost certainly does not constitute protected speech in itself.

"ACAB" - "All Cops Are Bastards"

(Not endorsing this view, just spelling it out bc I had to look it up.)

> But whether they're lawful orders or not is a different matter; strongly suspect that if this went to trial

Right: you win arguments against cops in court, not on the street.

Unless you're in your home, and they don't have a warrant.

ACAB?