Thank you for your question. I am a licensed Pennsylvania professional. Please permit me to assist you this afternoon.
The law in Pennsylvania pertaining to recordings is indeed an "all-party" consent statute. That means that all parties to a recording must consent to being recorded. There is, however, an exception based on situations where there is no 'reasonable expectation of privacy'. In other words, if someone is in a public place such as a public part, it is reasonable to assume that parties are filming one another so the law pertaining to consent does not apply. As a consequence images taken while in public are most definitely able to be taken, and can be shared with law enforcement without liability to the party taking the images for violating state law. If, for example, you are at the "Liberty Bell" pavilion and you see someone defacing it, as the pavilion is in open space where there is no reasonable expectation of privacy, you are free to take that image and share it with police.
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