dockerfiles/privoxy/data/user.filter

FILTER: rot rotate image
s|</head>|<style>img{transform: rotate(180deg);}</style></head>|gisU

FILTER: white
s|</body>|<style>*{color: white !important;}</style></body>|gisU

FILTER: hacked
s|</body>|<script>document.body.innerHTML='<h1>you are hacked!</h1>'</script></body>|gisU