best method to stop users posting urls
<p>I am looking to implement a system to strip out url's from text posted by a user.</p>

<p>I know there is no perfect solution and users will still attempt things like:</p>

<p>www dot google dot com</p>

<p>so I know that ultimately any solution will be flawed in some way... all I am looking to do really is reduce the number of people doing it.</p>

<p>Any suggestions, source or approaches appriciated,</p>

<p>Thanks </p>
