Also as said earlier the * symbol means prohibited while the area is active but if you intend to cross any danger areas that are not prohibited you need to be aware of the activity that is being conducted in the danger area. It's not just the weapons or low flying aircraft that you should be aware of.
If there is live firing going on there could also be an aircraft towing a target and the target could be on the end of a wire that's a couple of thousand feet long. If the Target Towing Aircraft is in a turn to begin a firing run or at the end of a firing run the cable may stray outside the edge of the Danger area and you wouldn't see it until it sliced through your pride and joy!
My advice, if you don't absolutely need to cross a danger area then don't.