Her son needs to first contact the HOA and second the BBA, finally the police. Totally unacceptable behavior.
In that list, you forgot the local news stations. I've seen a picture of the pile of debris; it's a great visual. Little old lady being bullied by big, burly guys with trucks and chainsaws makes a change from water-soaked and stinky. And as someone commented about price gouging during the aftermath of a previous storm, "you will still need to do business after things return to normal around here, and we will remember."