I'm struggling with the following sentence, wondering if they feel right or not :

"We won't allow it : how can we stop them [implying: from doing it] ?"

So, I've been told that using a "won't" statement combined with a question makes it non-english-like. What's up with that ?

Can "won't" be about the bare will, or only about the will + a well-defined idea of what we will actually do ?
And if yes, how can we turn that sentence right ?

I know it's a bit strange asking that but... seriously, what about it ?

Thanks a lot !