While there is some overlap with the question Should answer acceptance restricted who has asked the question? the background I am going to provide is a bit different.
The are Askers that are unlikely to accept a answer because they are not active members of our community, for example:
- Anonymous users
- Users with low reputation and inactive for a considerable time
- Users that are no longer using the SE
On this case, some users may give a late answer to ignored questions of theses askers and while the answer should be acceptable by the asker it won't be because he no longer cares.
While is true that answer acceptance is a privilege of the asker and should remain this way (since he is the one with most knowledge of the problem and the only one that can assert it was solved by the answer) it would not be reasonable that Moderators or High Ranking members of our community be awarded the right to accept answers to old questions of theses unlikely to come back askers?
By old I don't mean days, I really mean months or a year.