Contact your local Post Office. Carriers are NOT to leave parcels in an unsecured location - i.e. the front porch - without written permission of the addressee - unless the Sender (who paid the postage) included "permission to leave" on the package. As Jeff stated below - a small sign by the door will work wonders. 
BTW - I love the idea of Booming packages. Like the old snakes in a can. They wouldn't come back to my house, would they?