'No guarantees are made in regards to uptime or protection levels.'
I do search, Google search, for: 'google domain hacked'.
Many many links to read ..
Examples:
Aug 27, 2013: Google's Domain Hacked! | Lourdes Roashan: http://lourdesroashan.com/?p=62
'Seems to be that the Google Site for Palestine has been hacked and defaced by some hackers from Palestine, displaying a message about the change of name in the Google maps.'
Oct 19, 2013: Qatar DNS hacked .. - E Hacking News: http://www.ehackingnews.com/2013/10/qatar-dns-hacked-by-syrian-electronic.html
'It appears almost all hackers like to do DNS hijack attack instead of targeting the main target. DNS hijack attacks allows them to deface high profile websites such as Google, Yahoo and more.'
October 10, 2013: Google Malaysia Site DNS Hacked: http://techcrunch.com/2013/10/10/google-malaysia-site-hacked-credit-claimed-by-team-madleets/
'Google’s Malaysian site has been hacked and replaced with a splash screen ..'
April 15th, 2013: Google Kenya Defaced: http://news.softpedia.com/news/Google-Kenya-Defaced-by-Bangladeshi-Hacker-345326.shtml
'.. visitors of the official Google Kenya domain (google.co.ke) were met with a page that displayed the following message ..'
Google Costa Rica Hacked : http://thehackersmedia.blogspot.fr/2013/10/google-costa-rica-hacked-by-drfreak.html
'Hacker was able to hack to attack DNS poisoning using registrar server. Now Google Costa Rica Local domain have hackers DNS address. But one thing is for sure that this kind of cyber attack really create huge questions for security experts. Google.com.my was still defaced at the time of news published. ..'
Google.ro, Microsoft, Paypal, Yahoo, Windows Romania Hacked By Cybercriminal ..: http://thehackersmedia.blogspot.fr/2012/11/googlero-microsoft-paypal-yahoo-windows.html
'.. Most likely, the attacker hasn’t actually breached Yahoo! or Google severs. Instead, he gained access to DNS servers and altered the records to ensure that all visitors of yahoo.ro or google.ro would be redirected to his defacement page.
The Kaspersky researchers have confirmed out theory about Google’s public DNS servers and they highlight the fact that the attackers hijacked the 8.8.8.8 and 8.8.4.4 entries to redirect users to their own IP address.'
Etc etc many news like those .. try Google search to see ..