re: Pro Tip #1,773: How to stop spam text messages

That's probably not going to work because robo spam texting uses automated technology to send text messages to cell numbers. Marketers (and scammers) buy lists of cell phone numbers to use for this so the odds of one of those numbers being a landline are low already so they're probably not checking the replies. They're only interested in the clicks the included links get them. It's a numbers game. You can paste that bounce back message to them all you want but it likely won't work.