While we didn't have a single flag on meta.crypto in all time¹, according to our moderator tools (though I think I did flag something before becoming moderator), I think this is a good idea.
Not being able to edit on metas where I don't have the required reputation (and where I'm not moderator) already did hinder me some times.
Suggesting edits on meta pages should not give any reputation, of course.
¹This has changed since I originally answered the question: now (march 2014) we collected 11 flags in total.