Is it normal to refuse to watch a kid because he is destructive violent and threatening? he has ADHD and thinks that entitles him to do whatever?

I try not to lose my cool but I did yell because he broke a bunch of my stuff at my house including a birthday good thing I ordered two. he was throwing rocks at my car and punching cars and was acting violent. i asked them to leave his mom decided she didn't want to leave the party until I threatened to call the cops. Now she is telling everyone I am insane and it's so unfair no one will babysit her kid.
Is it normal to refuse to watch a kid because he is destructive violent and threatening? he has ADHD and thinks that entitles him to do whatever?
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