Blocking Pornographic Words

Hello,

The code below allows the user to add a table to a database, the name of which is chosen by the user.  It works great.  However, I would like to block the user from adding tables with pornographic names like "sex," "porn," etc.  How could I do this?

Thanks in advance,

John

<?php
if (isset($_POST['name']) && !empty($_POST['name'])) {
mysql_connect("mysqlv3", "username", "database") or
die(mysql_error());
mysql_select_db("sand2") or die(mysql_error());

$table = mysql_real_escape_string($_POST['name']);

$query = "CREATE TABLE `$table` (id INT(11) NOT NULL auto_increment, site VARCHAR(150) NOT NULL, votes_up BIGINT(9) NOT NULL, votes_down BIGINT(9) NOT NULL, PRIMARY KEY(id), UNIQUE (site))";
$result = mysql_query($query) or die(mysql_error());

}

?>