Ex-Speedbird is right...
As for Rusty, well welcome to the PPrune...aside from that, I've done the sort (from the left seat, so to speak) in Louisville once or twice, but more times than I care to count in DAY...
You have my utmost respect as yours is a thankless job, mainly for the reasons you list...
And you are right, there is nothing you, as a ground CREW, or I as a Flight CREW can do about it unless someone looks into each of the 1,000,000 packeges each night...
For some of those who find that number unbelievable, I'm sure many of those packages are "envelopes"...i.e.-overnight letters...
None the less, the situation remains the same...Night Freight is what it is, and pilots accept it as such...
Unless you as a trusted "Ground CREW" deliberetly load some spooky stuff on my A/C, I'm behind you 100%