I prefer trying to sell them something instead. It's usually something farm related as my father, ever the farmer-wannabe, buys tractors and trailers and sheds and farming equipment off eBay before realising he can't/has nowhere to use it. "Hmm, that broadband offer is almost as good as the horse trailer I have for sale? Do you keep horses...no? Well with this trailer, you could get ready to start transporting them, and then you're half way there!"
They start agreeing just so they can try and steer the conversation back, and then you go in for the hard sell
It's far more fun to try and sell them the things that they're selling, trust me They get very confused.