My point is, whether you agree with using the BF destroyer or not, (which I've gone on record to say I personally couldn't use it myself) BUT... the fact is IT WORKS.
So, if there's a reason why it works, there's also a reason it can be prevented from working.
The best defensive approach to anything, is to have a better OFFENSIVE approach. Meaning, you have to know ahead of time what you're up against. You have to take a PREEMPTIVE strike before anything happens.
Accept the fact that the BF Destroyer works. Then, Learn how to crush it before it even creeps up. (Kill IT before it it has a chance to set foot in your territory.)
The funny thing is, it ISN'T that difficult to "immunize" your girl so she doesn't fall for that technique.