Many many years ago there were conversations had about not bringing back the rpv (yes, I am that old) as the "enemy may follow it (!) leading up to "We should place explosives in it" so we can a: Dive on a too or b: Wander off at min fuel and push the big red button. Problem solved. Then along come the ah but brigade. Explosives you say, then here spend the next month reading these regs and reqs. At the end of which, with eyes bleeding, everyone went, no thanks. Plus a few little things like weight/space, etc.
When one is operating in an area where you can a: Call in the Marines (fig) to recover or b: Call in an airstrike to destroy (hopefully) then little to no attention is paid to the old charlie drake song "My boomerang won't come back".
When the little sod decides to beat feet quicker than you can dispatch something to shoot it down (and you may not know the direction it hoofed off in) and enters (violates) another country's airspace, one which you really aren't too friendly with, then many "Oh Crap, Oh Crap" recitations are heard and the options list drops to zero.
That is unfortunately the reality that uav/ucav/u whatever v bring with them.