This is a general question across SE sites, but I figured I'd ask here since I couldn't find the answer generally.
Suppose there is a high-voted question with a high-voted answer. It has been over a year and the OP has not marked the answer as accepted. It's clearly high traffic question that lots of people have (it may even have the block against "thanks!" comments turned on). Is it appropriate to flag such a question for moderators to come and mark the answer as "accepted"?