Good luck getting them blocked!  I have over the last two weeks been trying to get Verizon to do something.  I have talked to Christina, Donna, Jason and Stacy.  Two of them from the Advanced Tech Support and no one can do anything.  I told them that some of these numbers receiving this garbage could belong to children.  The last person said I would have to block all text messages or change my number.  They have to allow this "garbage" because it is freedom of speech!!!  That is what she said!  She said it would have to be changed at the FCC which I did call and they passed it to the FTC because it is coming from an internet address!  The FTC said they can only take the email addresses and pass the complaint on to their lawyers who will decide if there is a case!  No one is doing anything about it.  I have emailed each of the local news stations hoping to get help from them.  What's next?  A class action lawsuit!?!