Had no inclination whatsoever to chat with the young, bright-eyed, door-ringing, activist girl today, so I just said: "Look, I'm losing my job, getting divorced, and I hate the system but don't believe it can be changed."
That took care of it. Her face went from hopeful to edge of tears in the blink of an eye, but it worked.
I may be a bad person.
(I considered filing this under "What made me smile today," but that would have been downright ghoulish.)