Is it safe to post my CV online? Is it safe to post my CV online (with my physical address included)?  Should I be worried about identity theft in doing so?
Considering that public telephone directories with names, addresses, and phone numbers have been around for decades, I don't think there's a significant risk of identity theft here. You could consider using a distinct email for your resume such that if you begin getting too much spam you could manage it separately, but even that's probably not necessary.