Today (one/two hours ago, to be honest) I happened to see a suggested edit to a question in the main site.
While the edit was actually pretty good (it would have removed a flaw that probably wasn't considered by the OP), I was wondering if users should do such heavy edits to another user's question. With heavy, I mean adding rules, changing the tag (code-golf to popularity-contest for instance), or something else that could invalidate some answers or change the spirit of the question.
My question now is: should we just suggest such edits in the comments, and leave the edit task to the OP, or not?
I personally think that this should be is enough, since changing the rules should be the task of the OP (if he didn't use the sandbox, otherwise changing rules wouldn't have been necessary in most of the cases), but I'm asking your opinion.