I got a Cease & Desist from Chuck Norris back in the iPhoneOS 2 era for having a jokes app that listed Chuck Norris facts (among other categories of jokes). They also had Apple take my app down. I got it back up by listing Charles Gnorris facts instead.
LBJ currently resides in the Horseshoe Nebula, so luckily it will take many years before he finds out, so hopefully I don’t get a cease and desist anytime soon!