Not exactly helpful to your situation but have a similar situation here in the UK.
Found out the RAF issue a low flying timetable for fast jets and helicopters. Fast jets are cleared down to 250ft and helicopters ground level in set zones.
Problem is I've encountered low flying typhoons and tornados outwith these zones.
Might be worth looking into whether you are in a training zone or if there is some sort of schedule.
You could fit strobes but I'm not sure how much help that would be to a low flying jet at 500+mph.
500mph I doubt they would notice something as small as a mavic. I would have to have one hell of a beacon on it.