Remember if you get chicken Pox there is no such thing as immunity... most people only get it once but its more common than you think about people getting it twice. I have had it twice growing up Also if you have ever seen the victims with scars all over their body from chicken pox it will definitely put getting the vaccination a must.
Vaccinations are there to protect people but like everything in life there are risks. That being said every family has too make there own decision on what is right for them.
"Victims with scars all over their body"? I've never seen anyone with scars from chicken pox. And I got it in 2nd grade and gave it to everyone in my school. My brother got it from me and gave it to his whole middle school. No one had any complications from it (we would have known), and no one had residual scars, and certainly not "all over their body". It was 1982, and it was honestly not a big deal. The only minor issue was that I couldn't see my grandfather because he had never had chicken pox. But my grandmother came over to help take care of my brother and I.
I remember being home for a week, being itchy, and my whole class sent me handmade get well cards. I was the only person who got these, because then everyone else got the chicken pox, LOL. We never figured out where I got it from, but again, it was just no big deal at the time.
I don't doubt that there ARE people with chicken pox scars - but it isn't a foregone conclusion that one will get them. In fact, I'd bet that most people of my generation that I've ever met (and there have been many) had chicken pox as children and I've never seen one chicken pox scar.