The guy who was commissioner of my gay softball league 5 years ago spiraled into meth abuse and more or less disappeared off the face of the earth. Apart from his befriending me on Facebook many months ago, I haven't talked to him in about 3 years. Tonight, though, responding to something I'd posted on Facebook, he sent me a note - informing me that he is now homeless, freezing on the streets when not able to crash on friends' couches. (I don't know where he got computer access - probably a library.)
Sigh. At times like this, I am very grateful that meth never crossed my mind, nor my path.