I said filing the smooth surface of the nails, not filing all the way through the nail. It is the same as what woman do when they stick fake nails over their real nails... they simply rough up the surface for adhesive purposes, not file the entire nail away.
There are other, more logical, reasons to be outraged if that is your position on this.
> If they wouldn't grow back (no idea whether that applies to the cockroaches or not), I'd feel much worse.
The waxy surface will not grow back, well not if they do the more ethical approach as they would only perform this on mature cockroaches who will not shed any longer.
Again, not supporting or attacking their approach. I think the purpose seems to be the ethical grey area for me. For instance, the black rhino is considered extinct (last I checked) and how we save the white rhinos is by removing their keratin horns to stop poachers. Am I happy we have to do that? Certainly not, however, I'd rather have that then no white rhinos.