Have you ever met someone who you think should not be a parent?

Yes - I have met my fair share of people who I am not sure are fit to be parents. My Mother in law is one of them - where it's clear she manipulates her kids and shows extreme Favouritesm to one child - who is my Husband in this case. She treats her other two kids like absolute s*** and accuses them of all kinds of crap, including stealing from her. She's also highly demanding and throws tantrums like a 3 year old child if she does not get her way.