Index: wp-settings.php
===================================================================
--- wp-settings.php	(revision 1513)
+++ wp-settings.php	(working copy)
@@ -263,6 +263,14 @@
 if ( file_exists( TEMPLATEPATH . '/functions.php' ) )
 	include( TEMPLATEPATH . '/functions.php' );
 
+/**
+ * Block themes that are not GPLv2
+ * 
+ * @todo Define a blacklist to check against; make this an actual procedure
+ */
+if ( defined( 'THESIS_LIB' ) )
+	wp_die ( __( 'You are using a theme that is not compatible with WordPress.' ) );
+
 do_action( 'after_setup_theme' );
 
 // Load any template functions the theme supports.