Just a little correction. In the eyes of law, they are not at no
fault should they hit you actually, because they cannot control
their mental state. Hence a person psychological state is often
used in court as a defence.
On the other hand, you should still avoid them, not because you
retaliate you're at fault but because people who are mentally
disturb may not have the capabilities to control themselves, more
specifically their strength. Know of a 180cm guy who weighs about
90-100 kg got thrown over a sofa by a 150cm petite lady. They
seemed to have the capabilities to muster ALL their muscles, while
as typical human beings, we can't seemed to do that.
