
site_name allow to spoof the origin of the domain and so hacks like: <!-- served on https://hacktivis.me/tmp/joinmastodon.org.html --> <meta property="og:image" content="https://hacktivis.me/datalove/img/meme/pleroma/mastodon%2C%20forbidden%20amuse%20yourself.jpeg" /> <meta property="og:title" content="Mastodon: Forbidden Amuse Yourself" /> <meta property="og:site_name" content="joinmastodon.org" /> <meta http-equiv="refresh" content="0; url=http://joinmastodon.org/">