I second that. I misunderstood the original post, meaning to have compromised the condoms in a way that they would cause a pregnancy without the user knowing the risk or what had been done.
Unfortunately it is more common than many of us realize. Some women have done this. I'm glad to know that this was not your intent. Making the rubbers unusable is alright in my books. I'm hoping that it at least made you feel better with a bit of closure.