Escaped Markup Considered Harmful
Norman Walsh: There is clear evidence that the escaped markup design will spread if it isn't checked. If it spreads far enough before it's caught, it will become legacy. Some vendors will be forced to continue to support this abomination by simple economics. And it won't be their fault, it'll be ours for not killing the virus before it could spread.
While I am certainly sympathetic to that view, my current leanings are simply that any such escaping needs to be clearly identified as such.