1. I admire people who take a chastity pledge. Especially if they do it out of a desire to please the Lord. Not because I believe that it is what God demands of them -- I have a hard enough job figuring out what God desires of me, than to presume to know what God desires of others. But I do believe that God loves people who live to please him; and so if they do things like being chaste or eating kosher or saying a dozen Hail Mary's each day because they are striving to serve his Will, then I admire them.
1A. I believe God tells each of us in the Bible what he wants of us. But I think the "each of" is critical. I read the Bible for what he wants
of me. I
don't read the Bible for what he wants of others. My "proselytzing" role starts and ends with trying to convince people that having faith in Him is the coolest thing they could do; it doesn't extend to what they must do to show that faith. That's His job. Not mine.
2. I have no problem with a parent trying to regulate his/her child's sexual practice. It's part of the set of choices parents have to make as parents, and as someone who has never been nor desired to be a parent, I think parents should be able to make such serious choices even if they are choices I would not make.
3. In general, I think it is no one else's business what another human being does with the dangly or hollow bits. It's not my place to judge why people make such pledges or break them. It's not my place to substitute my choice for that of the parent or the child.
4. God knows what he wants us to do. I don't. I do believe he wants me to use the dangly bits in certain ways and only with certain people. But I have no clue what he wants others to do with theirs. And I find it really hard to believe that, apart from the "parental responsibility" thing, he really wants us paying attention and judging what they do or don't do.
And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what is that good and acceptable and perfect will of God.
Romans 12:2 (NKJV)