TheWizard
Nobody has said that anyone has or should "blunder into any old airspace willy nilly". Accidental incursions do occur from time to time, of course, but these happen to military and civilian pilots alike.
The topic being discussed is whether a pilot, civilian or military, who is engaged on a category A or B flight at night in open airspace should make a conscious decision to fly into the NOTAM'd area of a lights-out training flight.
You do give the impression that, because you have NOTAM'd the activity, you have priority over everyone else. You don't - a category A or B flight takes priority over your training flight.
When a civilian police/SAR pilot goes flying he does have the "correct knowledge" of "the current rules" but there is a very obvious flight safety risk if he cannot see another aircraft in the same part of the sky.
vecvechookattack
It is not "foolhardy and dangerous" so long as the correct procedures are in place for co-ordination between the aircraft involved. There is certainly a potential flight safety hazard if they aren't.
One possible procedure would be for the lights-out aircraft to monitor a radio frequency so that another aircraft can call and co-ordinate. That frequency must have been NOTAM'd so that the other aircraft is aware of it and it must be VHF. Most civilian aircraft do not carry UHF.
The Ugly Fend Off
It is good to see that you AD guys have some sensible procedures in force for the upper levels. That is not the case, though, at low level where radio and radar cover from CRC or ATC is limited.