Rabbit1, I am sorry for disagreeing with, well maybe not, but I think you failed to read or understand what I was saying.
Course maybe you have never put anyone into sub-space deeply enough that they are unable to use their safe-word. It is a problem that I have and have learned that safe words aren't all they are supposed to be. This may depend on the sub/slave and the level of trust they have for me, but to say that safe words are the end all tells me a good bit about you.