Yeah, and there is a guy currently fighting in court because he changed some numbers in a URL and was able to get information on other customers from AT&T ... CFAA.
This is different in essential details. Google are indexing these pages. That means the pages are advertised as part of the public internet.
Now not every layman knows how to properly hook things up to the internet, but there is a definite implied consent in doing so. If the pages were restricted by password and we were bypassing it, or they were locked to an IP and we could spoof it, then there wouldn't be an implied consent to access the service being provided; but that's not the case here.
If you want to look at intent then it's notable that many listed are University addresses - people setting up those printers absolutely know what they're doing.
If you purposefully used excessive paper/ink or you kill the hardware with a broken firmware update then those things are definitely not authorised by the implied consent and would constitute vandalism.
