Retired Warning Sign
It’s only fair to let people know what they’re getting into. You would consider it par for the course to warn people about a dog with a habit of biting people, wouldn’t you? So why not hang a sign that warns about the inevitable consequences of wandering into the lair of the retiree? At least then there is no doubt as to whose fault it is when some hapless soul gets subjected to hours of “education” on every topic from politics to bird migration patterns.