Google API Key Application Restrictions – Is It Secure?

I believe an IP address or http referrer can be spoofed, so can I trust that Application Restrictions (configured in the Google API console) will prevent unauthorised parties from using my Google API key?

Refer this SO thread for background info

DreamProxies - Cheapest USA Elite Private Proxies 100 Private Proxies 200 Private Proxies 400 Private Proxies 1000 Private Proxies 2000 Private Proxies ExtraProxies.com - Buy Cheap Private Proxies Buy 50 Private Proxies Buy 100 Private Proxies Buy 200 Private Proxies Buy 500 Private Proxies Buy 1000 Private Proxies Buy 2000 Private Proxies ProxiesLive Proxies-free.com New Proxy Lists Every Day Proxies123

Proxy Sites Proxy Tunnels Proxy List Working Proxy Sites Hotproxysite Proxy Sites Proxy Sites Anonymous Proxy Anonymous Proxies Top-Proxies.co.uk http://www.proxysitesnow.com Proxy Servers Free Proxies Free Proxy List Proxy List Zoxy Proxy List PR liste all proxy sites More Proxies netgofree netgofree Hide-MyIp - The Best Proxy List American Proxy List www.proxylisty.com/proxylist Web Proxy Submit Proxies Updated Proxy List Updated Proxy List aproxy.org Bypass Proxy Sites Free Proxies List Evolving Critic Business Web Directory Free Proxy List iShortIt MyProxyList Online Proxies Go Proxies Need Proxies PrivateProxies Proxies4MySchool Proxies4Work Free Proxy List Free Proxy Sites ProxyInside Wiksa Proxy ProxyLister.org Free Proxy List ProxyNoid Proxy List Free Proxy List Proxy Sites Proxy TopList ProxyVille UK Proxy WebProxy List

RatedProxy.com - Listing the best Web Proxies

Free Proxy List SchoolProxiesList Stay Anonymous Proxy List The Power Of Ninja Proxy List UNubstruct Free proxy sites Free proxy sites