Sample code for an adblocker check based on BlockAlyzer for WordPress

functions.php

function adblock_alert(){
    ?><script type="text/javascript">
        jQuery(document).ready(function($) {
            setTimeout(function(){
                if ( ba_blocked == true ) alert("You are using adblock.");
            },200)
        });
    </script><?php
}
add_action('wp_footer', 'adblock_alert');