The Verizon/NARAL tornado that passed through the US telecommunications village today (brief, but with a lasting effect) propelled me into reading the carrier rules for use of short codes.

They're remarkable.

Take a look at Verizon's rules, starting on p. 40 of the pdf.  No bad words, no chat services, no gaming, no dating services - nothing that Verizon thinks would either offend people or compete with its own services.