People have a right to voice their opinion, even if they are wrong. This is draconian and goes against principles of free speech. You have the right to say something you think, even if it turns out later that you were mistaken. These people just wanted their photos, and this lady wouldn't give them up without an extra $125 payment. Sure maybe she wrote it in the contract, but that doesn't mean they can't say they didn't realize what was in the contract and that the lady didn't tell them about this before.
I think people just felt sorry for the photographer so they violated the first amendment. Very sad