In order to run the amazon appstore or another source such as humbe bundle its nescessary to make the permissions change described. Certainly while amazon were giving away a free app a day i couldnt be bothered to switch this option on and off every morningso left 'allow unknown sources' switched on as i assumed i would not be stupid enough to knowingly download anything else.
That said ive noticed a significant increase in aggressive popup ads which appear to look like the google play store offering the current popular title (that vaguely porny looking one with kate upton in the adverts). Presumably these entice you to install a malicious excecutable.
Biting the hand that feeds IT
