Looks like they have a permit and the owner of the property lives in Alameda.

This is a CAL-OSHA concern. I cannot forward that in see click fix.

They have a permit to do the job , Sorry to see that you are going around the legality to get the owner and contractor in trouble because they are disturbing your peace , make no mistake building inspector look at every thing , if not up to code they will have the contractor or home owner fix it.
You will experience this when you will own your own house , it is not fair to get City inspector all bend out of shape when you have a permit posted .
I have all the confidence in our Building inspector , 30 plus year in Alameda .
Will someone get hurt? most likely , Roofer is one of the top 5 most dangerous job in North America
PERIOD , long before Firefighter or Police Officer.