[JKT]

1Password is not a haxie per se (those are from Unsanity and use their APE to screw up your system), but it is a "hack". It exploits the Input Manager system (which is meant to be only used for text input methods) to run its code within the apps on your system. From what I understand, the Input Manager system was meant to be removed in Snow Leopard but I don't know if this is still the case.