Yes, the folks at boingboing.net also think it's a good idea.
What I found most odd was this statement:
And yes, if someone did commit a crime using my network the police might visit, but what better defense is there than the fact that I have an open wireless network? If I enabled wireless security on my network and someone hacked it, I would have a far harder time proving my innocence.
In Germany for example, the owner of the connection is liable.