Even though these attacks can't be defended effectively with your own firearms, it is still a good time to stress the merits of legal, individual gun ownership in one's community.
If you've got em, carry binoculars and do a quick scan wherever you have to stop. Quick, discreet glances, favoring wooded areas, parked trucks or jumbles of crap.
I think that if this guy COULD do this on the weekend, he would have today, as an in-your-face to everyone who said he wasn't active then.