I am not a posek or a talmid Chacham, but it seems to me that to get a divorce, you have to go to a civil court. It may be an uncontested divorce or not, but marriage in the US is a civil matter and a secular divorce is necessarily.
I agree that there may be a FEW times when withholding or not accepting a get might be legitimate, but the average case involves a man who just wants to hurt the woman. Sorry, but that is how it is.
I don’t know if the picture circulating on FB is the same one that there was a demonstration about on Sunday, but if that is the case, Rabbi Auman from the YI of Flatbush was there and encouraged people to go. Knowing him, I’m sure he checked out the details and knew the husband was wrong.