I recieved unsolicited mail with pornography, what legal actions can I take?

I am EXTREMLY pissed off! I received an advertisement mailing that contained photos containing full frontal nudity, anal sex, and a few choice other photos for a mens sexual stamina pill. I would not be so upset, but I had my granchild in my lap while opening it and the contents fell out onto the table with the photos exposed. What legal recourse do I have? I am not so much interested in sueing them, but would like for them to be fined by the government and shut down their business practices. I would like to go so far as to inform CNN or someone like that. I don't want financial gain, just expose their sleezy tactics. I do plan to go to the post office and show them as I know it has to be illegal to mail unsolicited pornography. Any suggests on how to bring it to national attention and the proper authorities for them to be fined?