We all have those people in our lives. For whatever reasons, we no longer wish to communicate with them. Yet they persist. It might be as routine as a telemarketer, or it might be as complicated as a stalker. In any case, the ability to block messages from certain users can come in quite handy. While there are a few apps that will perform that function, and more, your BlackBerry has the ability to block text messages all by its lonesome. It takes is a couple of steps. As with most functions, this one starts in the Options menu. You’ll click on Security and then on Firewall. This might be an unexpected place to block text messages, yet there it is. You’ll have to check Enable in order to activate it, but once you do you can block text messages, pin messages, personal email, and enterprise email. This blocks all messages of that type, so you’ll need an additional step to allow other users to send you messages. The first and most obvious way to do this is by clicking the Contacts box under Exceptions. Now all of your contacts will be able to reach you, even if you have blocked a certain message type. Alternatively, or in addition, you can check the box for specific exceptions. The Add button on the bottom right will allow you to add email addresses, phone numbers, or PINs that will be able to send you messages even if you have them blocked. At any time you can go back to the Firewall screen and check out how many of each message type your BlackBerry has blocked. It’s a neat little feature that has a ton of realistic uses. Hat tip to Inside BlackBerry for reminding me of this little trick.