You're always open to being sued. Being charged depends on if you followed the right steps. https://en.m.wikipedia.org/wiki/Necessity_defense_(New_York) This one has some examples. You might need to use the Cloud to Butt extension if you're having trouble with the legalese.
Re: Question self defence weapon of choice
https://en.m.wikipedia.org/wiki/Necessity_defense_(New_York)
This one has some examples. You might need to use the Cloud to Butt extension if you're having trouble with the legalese.