Open wireless access point

Micah Joel of Salon promotes open wireless networks for his own personal security. “By making my Internet connection available to any and all who happen upon it, I have no way to be certain what kinds of songs, movies and pictures will be downloaded by other people using my IP address. And more important, my ISP has no way to be certain if it’s me.”

I am still torn. I use Wi-Fi Protected Access (WPA) Personal encryption at home. I live in an apartment building and others may be able to benefit from my wireless connection. Should I open my wireless access point?