You can set some security questions to your account so if it is accessed from an unknown location it will prompt the security question. Did you try that?
Also not sure what browser you use but for Firefox clearing history helps when browser is closed.
If they can't dazzle them with brillance or baffle them with bs......better to lie cheat and steal...(hack).
The shorts don't like it that you have slayed them dead in their tracks time and time again Mighty Max!