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@BenN: the tricky part with marking as NAA is that answers aren't put on hold, but deleted. I agree that link-only answers are low quality ones and they should be discouraged, although I don't think those with useful links should be removed from the site. Unfortunately this aspect isn't covered in the post you've referred to.
"low quality" flag is available only for users without enough reputation for voting to close on questions, and for answers there is something similar in the review queue, but in general it doesn't exist
"come up with a closed question that could be salvageable" - as I've written in my question I think improving closed questions is a difficult activity and don't think that new users would have enough experience for that. Nevertheless they tend to edit / answer old questions they find to ask for clarification. I think if some of them would find a question similar to his one the most he would edit in it would be to state he has similar problem and please ask. (but again, we're speaking about closed questions, they're either off topic or low quality (or both), ...
thanks fixer1234, it's more clear now. However I still think superuser's search engine should be more intelligent and find the question also in first case. I just can't memorize search rules for each site I use, and I think I'm not the only one...
@jrh - that's about open question. You can really improve them that way. However for closed questions this "light edit" won't be enough to make them on-topic.
@JourneymanGeek: I've rejected many of his proposals as not improvement. Even if he make true corrections I don't expect new users to correct only a few typos per post and spend others' time too.
