I would assert that the problem here is that the options do not reflect all possibilities. Describing a post that requires additional information from the asker as 'Unsalvageable' is plainly incorrect. It can be salvaged - by being improved by the person asking the question. Required editing, to anyone who hasn't read the instructions doesn't describe what is meant, which is what is called a minor edit on other sites. Instead the options should be something along the lines of:
- Looks Okay
- Requires minor edit
- Needs to be rewritten
- Unsalvageable
So that questions that do belong on the site once they have the relevant information can be improved and then answered, and the spam etc. separately put in a bin and disposed of.