> I'm curious on what grounds they blocked the app.
replyThe app probably used his pictures or his name, which are easy candidates for copyright or trademark-claims.
Mentioned below in a few comments but it was on the grounds of using his name/likeness.
reply(Not the parent poster) I found out about them in 2008-2009, and they were quite popular online and offline.
replyIf you're curious, maybe you can look into Chuck's lawsuit against Penguin's book of Chuck Norris facts. He would eventually "co-author" his own book. The obvious guess here is trademark infringement (over use of Chuck's name/likeness) and/or copyright (if some of these facts were lifted from his book).
replyInteresting. I get the likeness thing, but surely one could publish jokes about anyone they wish and that would be satire or fair use or something?
replyFacts and copyright is an interesting one, because I'm surprised a fact can be copyrighted, unless it's the wording specifically.
For better or worse, in the US you can pretty much sue anyone for anything. A court certainly requires more evidence to declare liability than Apple would to remove an app.
replyAs far as copywriting facts, are you really under the impression that Chuck Norris is the only man who can factually slam a revolving door? :)