Jehovah's Witnesses
Yes it does encourage our faith.
Sometimes. And sometimes they come back.
I will try to answer your question. If someone has left the Jehovah's Witness faith and no longer claims to be one of Jehovah's Witnesses, he can do as he pleases. However, Jehovah's Witnesses do not participate in inter-faith activities, so he cannot be one of Jehovah's Witnesses and a member of another religion.
By reason of death, or change of faith- that is the question.
Actually Jehovah's Witnesses are able to independently research their faith. They encourage their followers to study the bible and their faith as much as they can. Although I am not a Jehovah's witness I was raised in the faith. Jehovah's witnesses receive bible study, they go to 2 meetings a week in the kingdomhall and attend book study. They have a more rigorous study of the bible.
Jehovah's Witnesses do not keep family records. Tracing their family is not a requirement of their faith like it is for Mormons. Jehovah's Witnesses share in a Bible educational work. You can learn more at watchtower.org .
Jehovah's Witnesses absolutely believe that faith is an important part of their being a Christian (I'm assuming that that's what you are talking about). But it is important to note that Jehovah's Witnesses very much believe in the Bible verse where it says, "Indeed as the body without the spirit is dead, so also faith without works is dead." - James 2:26. So it is important to note that while, yes, it is important to have faith, but according to the Jehovah's Witnesses, if you don't act on that faith (especially as relates to your true knowledge), you are not doing what Christ himself did and commanded people to do. Their view is that knowledge for knowledge's sake is worthless.
If you mean best man and maid of honor, anyone can be witnesses, regardless of faith
Even though there are many places around the world...China and Russia for example...that have banned Jehovah's Witnesses, they are still practicing their faith. There are many Jehovah's Witnesses in Pakistan.
Yes and no. Young witnesses are told to date only with the intention to marry and to marry within their faith. Once they come of age for marriage, they may begin dating.
Some are afraid of being bullied or teased because of an unfair stigma attached to their faith. Some simply prefer to keep their faith private.