A couple I remember from back at least 40-50 years ago:

The Langscaper's Song.
(sung to the tune of The Marine Song)

From the ants in our petunia beds
To the crabgrass on our lawns
We will fight them off with chemicals
'Til the bugs and weeds are gone.

We'll use quarts and quarts of poison sprays
And we won't stop 'til we're through
All the bugs and weeds are dying now
But the plants and trees are too.


The Mafia Song:
(Battle Hymn of the Republic)

Mine eyes have sen the gory of the coming of the mob
With an ice pick or a .45 they knock off every slob
The Don gives all the orders for each big or little job
Godfather marches on.

Gory, gory how they slew ya
Gory, gory how they slew ya
Gory, gory how they slew ya
Godfather marches on.

When the boss puts out a contract in your head they'll make a dent
Then they'll wrap you in an overcoat that's made of cement
On the bottom of the river, you'll become a reseden
Godfather marches on.