Twitter isn't allowing users to post a link to Kickass.to stating that the URL in the tweet 'appears to link to a page that has spammy or unsafe content.' I tried clicking on one of the URLs sent to me by one of our publishers who wanted to share with us a draft copy of the soon to be published book and as soon as I clicked on it I was greeted with a rather unfamiliar message on Twitter. 'The site you were trying to visit may be unsafe! This link has been flagged as potentially harmful.' This led me to try out a little test of linking a random Kickass.to link and Twitter blocked the request with a message: 'Oops! A URL in your Tweet appears to link to a page that has spammy or unsafe content.'"
Fluffeh adds: "Questions to Twitter about the reason for this unusual blockade remain unanswered. On its website Twitter claims to use Google's safe browsing diagnostic tool, but the Kickass.to domain is not blocked here. Perhaps even stranger, KickassTorrent's old domain Kat.ph gets the same blocking treatment."