you just can't debug that .. because it is disabled.
That's just ridiculous. Perhaps you can disable the Perl build-in debugger. But you can't disable external debuggers. Sure, you can add code to the executable that makes them harder to use, but you can not prevent your program from being run under a debugger or in a virtualised environment.
If you think you can, show your code!
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)