There are several questions asking for a good way to model something. Are they in scope, or should they be closed?
Because a recent example is “Semantic distance between excerpts of text.” by John Berryman, I will take this as an example, but I would like to discuss a general issue.
Some people argue that this question is really about natural language processing and that without a rigorously defined model, the question is not about theoretical computer science and therefore is off-topic. I almost agree, but not completely, because it seems like a plausible possibility that questions like this can lead to interesting answers in the theoretical computer science.
I am not sure if I want to see more questions of this kind or not. On the one hand, it is interesting to see connections of theoretical computer science to various fields of computer science, and encouraging this kind of questions increases the chance of seeing such connections. On the other hand, if 20% of the questions on the top page are like this and few of them get answers interesting to me (and worse yet, they are bumped by community ♦ from time to time), I am sure that I will get sick of those questions.
Added: Another example of the how-to-model-this questions is “Finding islands of vertices in a network of roads containing one-way streets” by shindigo. This question was closed, and I was one of those who voted to close it. Honestly speaking, I did not realize that this question was in the same “how-to-model-this” category until Suresh pointed out in a comment to the question (silly me). I hope that comparing these two questions (and possibly other questions in the same category) may shed some light on what we want to aim at about how-to-model-this questions.