Time will ultimately tell. The way to spot truly problematic questions is tons of answers that don't really contribute much. If all someone has to do to answer is leave a link, or just a few words, or a picture of their favorite bird, etc - then the question has some fundamental issues.
Questions starting more of a discussion should be reasonably narrowly-scoped, and invite (more like require) answers with a bit of depth to them.
So far, these have been pretty decent questions (well, for the most part). If we turn into more of a 'getting to know sound designers and engineers' than a 'lets talk about some hard problems in sound design and engineering' sort of place - then we're going to need to put the breaks on.
But, for that to happen, this community is going to need to experience those problems, and that might not ever happen. We (Stack Exchange) know what can go wrong with these, but we don't know if that's going to happen on any given site until it does.
So yes - be on the lookout for questions that are just going to get an absurd amount of not very useful or engaged answers - then vote to close them as too broad, as that's the definition of what we don't like about them. If that's not likely to happen - then answer the question if you can :)