Yeah, the way I look at it is WEP is just kind of a courtesy thing. It just means "hey, I want to keep my network private, please don't use it" (whereas I think any open network should automatically be legally fair game for anyone to use for legal purposes, within reason). It's sort of like locking a screen door. It's not actually going to keep anyone else, just means "please don't come in without asking".
WPA is real security.