Never. Never EVER. There's a COST to it, of course, but the world needs people willing to pay that toll so everyone else can remain ignorant of the danger that lurks, so they can be at home, in peace, and never have to face what the rest of us have seen. It's a price we pay, and everyone willing to pay it...
I think we have the greater reward in the end, that we've been able to do our piece, that we preserve lives and liberty as best we can. So many things would destroy us all. Better to take the stand for those who can't.
But too much? No. There are too many other principles at play to ever say that.