This should be stripped/escaped in safe_mode.
<script> alert("Hello world!") </script>With blank lines.
<script> alert("Hello world!") </script>Now with some weirdness
<script <!--
alert("Hello world!")
</script <>
`
Try another way.
<script <!-- alert("Hello world!") </script <> This time with blank lines. <script <!-- alert("Hello world!") </script <>