What a strange thread title. I’ve read it four times and I still can’t figure out where the punctuation is meant to go.
The P man’s web site
You’re an Aussie, so unless you’ve visited the States, southeastern US in particular, it would make no sense at all.
I wanted it to read SC pee buying illegal/South of the Border closes Pee stop/Cecil Sez he’s gotta go.
Explanation: South of the Border started back in the 1960’s as a fireworks stand in Dillon, South Carolina, just below the border with North Carolina. With the increase in car traffic once I-95 was started, the kitschy place grew to include souvenir shops, an amusement park, motels, restaurants, and finally qualified for it’s own zip code-SOB, SC 29547.
They promoted the enterprise with hundreds of garishly painted billboards, all featuring the mexican pitchman Pedro in many non-PC ways. I was treated to this as a kid, traveling to see my Dad’s Mom in SC every summer.
My apologies for mistaking Pedro for Cecil-don’t know if it is SDMB influence, or that of a car dealer who used a campaign for years: Cecil Sez shop at C&C Ford.
My bad. :o
I gotta confess the thread title made me scratch my head too, even though I knew that it had to be a takeoff on the South of the Border “Pedro Sez” billboards. It just wasn’t fitting in my head 
Actually, if they’re selling it via mail order, couldn’t an argument be made about mailing biowaste or what have you?
[Devil’s Advocate]Your preparation of African Violet potting soil for a beloved relative in Hohokus contains manure. Does that inclusion render it biowaste? Should it be prohibited?[/DA]
The (perceived/expected) use of irrespecial substance appears, IMHO to be the damning factor.
Do you pronounce his name “Pee-dro?” (Serious question. Well, as serious as it can be, under the circumstances.)