It seems 8.8.8.8/32 was hijacked yesterday for 22 minutes yesterday, affecting networks in Brazil and Venezuela.
https://twitter.com/bgpmon/status/445266642616868864/photo/1
So about that RPKI thing���having a quick look (via whois.bgpmon.net) it seems Google does not have an ROA for 8.8.8.0/24. Yet another reason friends should not let friends use Google���s recursive resolvers.
Perhaps their RIR doesn���t make it as easy as APNIC does to create ROA objects.
Cheers,