Banned for life
Darth Vader was banned for life by George Lucas himself way back in the day for spilling some secrets. Okay, so it was not actually Darth Vader, it was the man who portrayed him, David Prowse. Apparently, he and Lucas did not get along, and eventually, this led to a lifetime ban from Star Wars events.
Could you imagine getting banned from all Star Wars events when you played one of the largest characters in the film? It was rumored that among some arguments, it was Prowse who spoiled the plot twist that Vader and Luke were related to. Lucas could not forgive the actor for ruining the surprise before the film hit theatres.