Since I have to pay twenty cents for each text message I receive, I am not very fond of spam text messages. Leo LaPorte on Security Now says that he just deletes the messages and that one should never respond, even if it is to say STOP, since that may generate a $35 fee and will only notify the spammer that this is a good phone number.
Here’s what the FCC says, “The TCPA and the FCC’s rules ban many text messages sent to a mobile phone using an autodialer. These texts are banned unless (1) you previously gave consent to receive the message or (2) the message is sent for emergency purposes. This ban applies even if you have not placed your mobile phone number on the national Do-Not-Call list of numbers telemarketers must not call.”
You can also complain to the FCC at this URL.
Also some carriers have ways of controlling this type of spam.
If you use an Android phone you can try a free app to control spam text.