I have in mind what issues you mean, although, this could be a great feature if moderators and/or editors are active enough to deal with users that really break the rules (like strong language, and other of these doesn't come in mind that fast). But, it's pretty much a rare occasion.
The better thing is to make people flag closed question a 6th time, for strong language and these, so that moderators and/or editors don't need to look at these all the day.
+1
(Hey, didn't you got this question in mind because I said: "please flag four times, or else this question is hidden instead of closed". owo)