diff --git a/.gitignore b/.gitignore
index 5902a10..584df56 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,7 @@
+banned_numbers.js
+mixpanel_config.js
+keys.json
+
 *.swp
 *.swo
 *~
diff --git a/app.js b/app.js
index 6dfc123..7d8f484 100644
--- a/app.js
+++ b/app.js
@@ -7,6 +7,7 @@ var express = require('express')
   , spawn = require('child_process').spawn
   , Stream = require('stream')
   , providers = require('./providers.js')
+  , banned_numbers = require('./banned_numbers.js')
   , mixpanel_config = require('./mixpanel_config.js')
 
 var access_keys;
@@ -68,6 +69,11 @@ function textRequestHandler(req, res, number, region, key) {
     res.send({success:false,message:'Number and message parameters are required.'});
     return;
   }
+  if (banned_numbers.BLACKLIST[number]) {
+    mpq.track('banned number');
+    res.send({success:false,message:'Sorry, texts to this number are disabled.'});
+    return;
+  }
   var ip = req.header('X-Real-IP');// || req.connection.remoteAddress;
 
   var message = req.body.message;
diff --git a/banned_numbers_example.js b/banned_numbers_example.js
new file mode 100644
index 0000000..fad14b0
--- /dev/null
+++ b/banned_numbers_example.js
@@ -0,0 +1,8 @@
+// People are added to this list if they contact Textbelt when someone is
+// abusing the service.
+
+exports = module.exports = {
+  BLACKLIST: {
+    "9145555555": true,
+  }
+}