As one of the malware that exploit Google Cloud Messaging service they mentioned Trojan-SMS.Android.Op.Fake. which is installed in 97 countries on more than one million Android devices. Beside sending SMS messages to premium numbers and stealing contacts from the address book, trojan virus has the ability to delete messages and contacts and send messages with the included links to malicious applications to all contacts in the user directory.
Kaspersky Lab have informed Google about their omission, and stated that the only way to protect user against such failures is for Google to block the accounts of developers who turn out to be criminals.
[Ed - But wait... the cloud is safe right?]
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