I more and more often get some answers marked as solution that maybe (or surely) not the solution for the problem. This happens to appear mostly on older answers.
My current guess: It's users trying to "fix" their low acceptance rate. They - in most cases - didn't follow the progress of the Q/A, didn't provide any more details or answered Qs. Then they come back, "fix" the accept rate to prepare asking further Qs.
How to handle that? Flag? Close vote? Comment (already tried that several times without any satisfying result or even any answer)?
To make it more simple & clear: It's about Qs where I was the only answerer. Here's an example Q/A, where my answer got accepted as solution today. The A is a) far from best practice and b) not completely addressing the issue. It's maybe not the absolutely best example, but I'd have to search for too long inside my answers and hope that you got the point anyway.
I can't downvote my own answer. Plus: I can't mark it as "not the (full) solution"