Can you use internet marketing software legally? What the best Softwares available?

CAN you use automated software? to advertise LETITALLY. EXEMPLESMYSPACE: BOTS. TOUR BOT ADDER m? Singing ADDER AMICraigsList DISPLAY BOTSWWW. THE CLASS OF CONNECTION. COM 1500 LIST ONCE ads. I suppose that the SOFTWARE is? Gal because they sell it in USA of U.S. COMPANIES. Legal factors? Do you know of software that is legaly to help? automation on the ads on sites diff? ent? WHAT ARE THE BEST INTERNET MARKETING SOFTWARE today.