No, I've not met one but I know what they believe in and it's pretty extreme. It's a sect and they are hardcore "Christians". Mormons are pretty hardcore, but I guess many young people might be less hardcore, as with many Christian sects. But Romney is a Bishop and doesn't approve of single moms, so he's pretty damn fanatic in my book.
Ron Paul coming into power would be a disaster for the entire world, he's worse than all those other guys because his impact will be greater.
Btw, you should watch the South park episode about the book of Mormoms + scientology church. Very funny.