I'm going to go out on a limb and say they're inherently not constructive.
Sometimes I hate the fact that we can't point to a teaching and say "BEEP! Wrong. That's a heresy!" Some of the things people post are just flat-out wrong, according to what I believe. But there's the problem. I'm also wrong according to what they believe.
As I said in "Another reason this is not a Christian site":
Would you really want this to be the place for a potential converts or new believers to learn about Truth?
I wouldn't. Assuming that there is one Truth, this isn't the place to
find it. We have many active users, all with different backgrounds
and beliefs. Since this site is meant as a place for sharing ideas,
any question a seeker asks will likely have many different answers,
all of which the answerer thinks is the Truth. A seeker will find
nothing but conflicting answers and confusion here. To avoid
confusing people on topics that may have, as Christianity believes,
eternal consequences, it's best to clarify that this site is not meant
to be a place to find that kind of Truth.
This is above and beyond what you've asked, but I've been asked several times why I spend my time here if this isn't a site for Truth. I've been asked by several people why I would waste my time on a site that isn't promoting God's Truth, and worse, seems to have standards that make it easy for people to say "See, they can't agree on anything." At it's worst, visitors, true seekers could come her and see that we just don't agree on anything, and it can outright discourage them and leave them thinking there is no Truth. That weighs heavily on my mind, which is why I posted the "Another reason this is not a Christian site" post.
I'm going to share this as encouragement that this site, even thought it is not a Christian site, does still serve God's purpose.
I once hoped that this site would be a place to teach seekers Truth, but I gave it up a long time ago. Instead, I now see it as a site merely to learn what various groups teach. This is useful in two ways:
- It allows me to hear perspectives I wouldn't normally hear preached. I can evaluate these perspectives, measure them against the plumb-line of God's word, and determine if there is cause to question what I believe if there is a conflict. This can either strengthen my faith in my current beliefs, or lead me to see God in a new light, and ensure that I'm not merely following dogmatic teachings.
- It allows me to see what others teach, which is helpful in Apologetics and witnessing. How can I refute heresies if I don't understand the heresies? Thanks to this site, I can better understand these heretical teachings and refute them.
This site may not be winning non-believers to the Kingdom of God. And it may be discouraging some honest seekers, but it does have a purpose. Unfortunately, that purpose is simply not to be a source of Truth. The purpose is to be a source of information to equip us to better discern, understand, and teach the Truth.
Allowing Truth questions is just not constructive all around.
- From a StackExchange guidelines perspective, it allows polling, debate, discussion, and makes it impossible tp get one correct answer, due to our inherent fallibility.
- From a Kingdom of God perspective, it adds to confusion and is more likely to turn seekers away.