I am so old I remember when text messages were something you got from a friend on a phone that flipped open and you had to press the numbers on the keypad sometimes three times to get one letter. SIDE NOTE: will someone look up whether I can get into the Guinness Book of World Records for "longest sentence ever?"
Age aside, I have now accepted that sometimes a text message can come from someone I don't actually know. I get Amber Alerts (because I REALLY want to spot a kidnapper's car possibly so I can say, "Hey, jerk face! Your car and its license plate are all over the highway signs. Since you wanted to go to jail so badly, I'm making a citizens arrest. Don't move or I'll shoot you with antibacterial gel!"). I get texts from people running for president (always disappointing because they rarely invite me to hang out or go to a movie - at least not without a campaign contribution). Those, I don't mind so much.
Text spammers, however, are most likely the devil's helpers. I went online and found my carrier advising people to reply with "block." Sometimes that seems to do the trick.
While I'm at it, let me do a bit of a public service. If you get one of these texts, don't call the number. You should contact me. I will take your personal information and protect it in my Nigerian bank account.
PS - If you don't like my tactic, here's what the FCC recommends.