most of the new flappy Birds clones are security and privacyrisks (some even infected)
This is what McAfee is telling in a new report about Mobile malware
"The addictive Flappy Birds app was pulled by its creator from app stores in February, which meant a surge in clones of the game. According to McAfee Labs, much of the malware found on these copycats included ways for perpetrators to make phone calls, install additional apps, extract contact lists, track geo-location, and establish control over the device to let them do things like record, send, and receive text messages.
this is why it was a bad idea to take it offline and not to keep it herdered by an organisation even if the developer wanted some anonimity back
the main result of his action by which he wanted to do some good is the enormous rise of very dangerous clones