Am I a bad parent if I taught my daughter to poke her class bully in the eye if she makes her sad again?

I think when our child comes back telling us that somebody hit her, the instant thought that comes to most of us is, 'you should have hit that child back.' And to be honest, I not only secretively think all this, but I have told my daughter many a times that if the kid will hurt you again, hit that kid back, only to feel later (what kind of life am I raising!). We parents, too, were kids ones, and the part of that kid stays with us for quite a time (even beyond our 30s and for some even till 70s), and in such circumstances, we advice our kids what we would have done. And being a parent, we ourselves get hurt if we get to know that our kid has suffered. But, this is where perhaps 'good' parenting comes in the forefront. I think by advising the kid to follow the idiom, 'tit for tat', we are not rearing a future that this world requires. The world is full of such people. By this I don't mean, that keep getting slapped or hurt, but we should tell the child that you can report the bad behaviour or action of another child to the teacher who would look into the matter and may be discuss with the concerned parents if the behaviour continues. So, I think preparing your child to be alert and not to get bogged down by the situation is what one can teach the child.