With the help of JavaScript libraries, it’s very easy to identify facial features and start building your own filters. There are a few considerations though that we did not cover in this tutorial.

That's what everybody else does," Smith said. MSN's Hotmail, for example, filters out JavaScript commands, or tags, in HTML e-mail without changing words, according to an MSN representative.

With the help of JavaScript libraries, it’s very easy to identify facial features and start building your own filters. There are a few considerations though that we did not cover in this tutorial.