Another sugestion... when they deliver the package... open the door wearing only a pink feathered boa, high heals, and your girlfriend's thong and bra. Then, as the Fed disguised as a Postman stands there a moment looking a bit shocked, give him a wicked grin, lick your lips and say, "Hi, handsome. Are you really here to deliver?" Emphasize the "deliver" with a little pelvic thrust.
Then, when he asks you to sign for the package, start to sign... but then stop. Study the package for a moment... looking ever increasingly concerned - then shout out, "That's not the Twin Torpedos!" Start walking around in circles, yank at your hair - throw his clip board. Keep repeating, "I've been waiting for weeks for the Twin Torpedos. Weeks" "What am I going to do? The Tower of Power is broken. Besides I can't find batteries for it anymore. They only make those kind in Japan."
Then...
Stop as the realization sets in. Look deep into the Fed/postman's eyes and say, "Do you want me to sign for your package?" with an ever growing lascivious grin spreading across your lips.
At this point he probably will just bob his head up and down. He jsut wants to cuff you and get-the-f-ck-out and take a shower.
Say to him (while rubbing your crotch):
"I'll sign for it if you come inside and show me how you DELIVER! I want you to make my Tower of Power quiver!"
With luck... the Feds will leave with the package and not bother you in the future.