With this stuff and the DS all bets are of, a good precaution is to have loved ones stay away from anything remotely similar to a crowd, especially anything connected to politics and government.

If they try a FF they are unlikely to try it in a place that they don't want people to notice so while something like a school shooting there is unlikely, riots and overt attacks in/on/near facilities where audit and related personnel/actions are taking place isn't something I would rule out.