There are a few people at my office who used to do that. They'd tell me how I'm insane, going to get killed, etc. A few high-profile cyclist deaths out here fueled them even more, then they'd send me e-mails with links to the news sites, and tell me how cycling is equivalent to suicide.

Now, whenever I hear news of a really bad auto crash here in town, I send them a link to the story and tell them how awful and scary it must be to drive in to work every day.

They've since stopped berating my riding.