Do this kind of thing on your own domain.
I have a list of major sites with currently active phishing pages.[1] This is basically a join of PhishTank and DMOZ. Nobody seems to be upset by that.
Google is at the top of the list because of their hosting business. It's not just Google Sites. You can put a web site in a Google Spreadsheet cell, which Google doesn't seem to check as a possible phishing site.
If you host for others, or offer a URL shortening service, you need automated checking against all available phishing lists or you will be exploited.