Oh, I don't actually think it would be a problem given how you've detailed it.  It's exactly what they look for, though they take .blend files demonstrating the problem so it's simpler than a series of screenshots.  If they don't consider it an issue, they tell you (and very politely, too).  The big discouragement is against multiple reports of the same bug (regardless of whether it's a bug or something they're leaving for now).  As long as you make sure it's not reported already, I doubt it will be an issue either way.  And even if that's not the way that particular inset tool is meant to be used, it's still a bug.  It's just a UI one instead of code. :)