The Yarn Harlot, aka Stephanie Pearl-McPhee, is a humorous knitting author/blogger. In (at least) one of her books she writes about the urge to inspect stranger's knits in public. I laughed when reading but foolishly thought my knit stalking was safely confined to Knit Night.
Yesterday I was riding the bus and noticed a man wearing a lovely hat. It was obviously hand knit--the yarn, the fit, the decreases at the top. It may well have been homespun, too. I almost got up, sat down next to him, and said "I like your hat." Which, ideally, would lead him to tell me the story of said hat. I was also grieving for my lost hat so it was quite emotional in my adorable little head ;)
Luckily for him, he exited the bus just as my urge to accost him was becoming overwhelming. It was a beautiful hat, though. He wasn't bad looking either, hee hee.