It might seem like the responsible thing to do: you get a weird text from a mystery number, and at the bottom it says, “Reply STOP to opt out.”
But before you tap that reply button, you might want to reconsider. In some cases, responding at all could actually increase the amount of spam you receive.
Here’s why: Replying “STOP” confirms to the sender that your phone number is active, and that someone is reading those texts. That tiny bit of data is gold to scammers and spammers. Once they know you’re real, your number could be targeted even more—or sold to other shady senders. Not ideal.
Now, this doesn’t mean replying “STOP” is always a bad idea. If you get a message from a trusted source—your bank, pharmacy, school, or even a retailer you’ve opted into—it’s usually safe to reply and opt out that way. These organizations are required to follow opt-out laws, and replying “STOP” should actually unsubscribe you.
But if the message feels sketchy or unexpected, don’t respond at all. Instead, block the number and report it as spam if your phone allows it.
On both iPhones and Android devices, blocking a number takes just a few taps. You can also turn on spam filters in your message settings for added protection.
So next time a random number promises you a free cruise or claims there’s a problem with your delivery, resist the urge to reply. Ignore, block, and move on. Letting that “STOP” message fly could open the door to even more junk.
And let’s be honest—your phone already has enough notifications. You don’t need extra spam yelling at you about your car’s extended warranty.