There is a custom in Minnesota-and I'm not sure to what extent it exists elsewhere-but here and there, roadside memorials materialize that obviously mark the spot of a fatal accident. Sometimes they are in the form of a cross, or sometimes they consist of a small collection of artificial flowers. Occasionally there is a small sign with a name.

While I have no trouble understanding the motivation of loved ones in honoring their deceased, I've often wondered whether this ritual is a good idea.