There's no rational, intellectual way to respond to people who send you bike crash links.
So I retaliate in kind.
Every time there's a car crash--especially if it's an SUV rollover (We've had at least one a week of those lately)--I retaliate by sending the link to the article to the person trying to get me off my bike. After a few of those, they quit hassling me.
Here's one from today's Star. Not the best example since there's a question of speed and intoxication, but you get the idea. I can't figure out why The Star makes you pay for any article other than today's paper...