We're not exactly sure what's going on here, but it certainly seems like at least some Google Voice voicemails are being indexed and made publicly available somehow -- if you use "site:https://www.google.com/voice/fm/*" as a search string you get a few pages of what appear to be test messages, but there are a couple eye-opening obvious non-tests scattered in there as well. Dates on these messages range from a couple months ago all the way until yesterday, so this is clearly an ongoing issue -- hopefully Google patches this up awful fast.
P.S. - Google Voice transcription accuracy really falls
