1.) go down to you local welder and have them make you a boiler plate box the size of a mailbox.
2.) weld said box to an 8′ long I-beam
3.) dig a 4 foot deep hole at the side of the road, insert 55 gallon drum of wet cement.
4.) insert I-beam in 55 gallon drum. Insert your mailbox in your boilerplate box. Paint boiler plate box white, with ducks, kittens, etc.
6.) drive around looking for cars with missing passenger side fenders that match those on your lawn.
7.) show drivers of said cars your baseball bat.