WordPress Decoy Page

functions.php

<?php

function decoy_page( $query ) {

	global $wp;

	if ( !is_admin() && $query->is_main_query() ) {
		if ( ( $query->get( 'page_id' ) == get_option( 'page_on_front' ) && get_option( 'page_on_front' ) ) || empty( $wp->query_string ) ) {

			echo 'This displays when set to A Static Page and the homepage is showing.';

			set_query_var( 'pagename', 'home' );


		}
	}

}

add_action( 'pre_get_posts', 'decoy_page' );