All the contents of my house are publicly accessible to anyone who wants to break a window--this data is less important than any of that stuff, I just didn't want it sitting out on the curb, so to speak.
Edit: I hadn't thought about WEBDAV being an entry point, though--thanks for pointing that out.
Automated crawling is way different than physically breaking and entering. One is a (legal!) routine process executed by robots and one is a serious crime that requires will, forethought, and physical presence.
Automated crawlers were not the threat I was trying to guard against--it's more the 40 year old creep looking for pictures of kids on people's blogs and being bold enough to leave disgusting comments that I wanted to get away from--problem solved.
Edit: I hadn't thought about WEBDAV being an entry point, though--thanks for pointing that out.