Charles Grodin was not banned from SNL

Every time I hear of SNL hosts who have been "banned," I'm reminded of this post by Mark Evanier, in which he points out that "banning" and "not being asked to host" are two very different things.  Additionally, saying Charles Grodin was "banned" from the show for showing up unprepared is ludicrous.  Google "Charles Grodin SNL banned," and you'll get a ton of terrible lists about him... but really, do the authors think everything on television is real?  This article is from Mental Floss, for God's sake!
Grodin's entire meta-episode is clearly scripted.  Lorne Michaels would never let a host skip dress rehearsal and then just "wing it" for 90 minutes.  If you really believe Charles Grodin showed up unprepared, that means you also believe that Dan Aykroyd really does have a cone-shaped head, and Will Ferrell really does wear American-flag Speedos.  Shame on you, Mental Floss!
Further evidence of Grodin's non-banning is the fact that, at the time, he was (and is) good friends with Simon & Garfunkel, as is SNL producer Lorne Michaels.  Additionally, Grodin was working on "The Paul Simon Special" for Michaels and NBC at the time, which was essentially an episode of SNL taped on a closed set, without on an audience.