My favorite time waster story was an old guy who took a scrap junk car from me (his retirement career).
Said some slick guy in a suit showed up on his farm property unannounced and made him an offer on it.
Owner was so annoyed that he smiled and told the guy to come back tomorrow and they'd talk it over.
Guy shows up the next (sunny) day with a colleague... both in suits... in summer... in the southeast US.
Owner proceeds to walk them 6km+ around the perimeter of the property while dangling the possibility he'd be willing to sell.
Then finally ends things with "But you know what it comes down to? My dog was born on this property, and she's pretty old now. I don't think it'd be kind to move her. So I appreciate your time, but don't think I'm interested in selling."
Was impressed at how much time and ingenuity retired folks have to fuck with people, just because they can.
My favorite spam call was someone wanting to make a cash offer on the Ohio State University building that my office is in.