Space junk falls on Western Australian minesite

Because it is still covered in residual reality distortion shreds from the field which is camouflaging all the UFOs.

The standard advice is to keep your distance and contact the authorities. The debris can easily have low enough level of hypergolics to be unnoticeable, but high enough to cause health problems

One wouldn't easily. But assuming it may is a necessary precaution. Hydrazine is common and harmful in rather small amounts.