Users frequently add irrelevant tags to questions, obviously just for farming reputation points.
It's obvious that these edits are solely for farming reputation points.
Since a reviewer often doesn't know the subtle differences between these tags, and frequently tries to avoid significant effort to figure this out, he just approves the edit, which is bad enough.
And it's annoying since the "category" of the questions becomes less precise. For example, if someone wants to search for language related issues in Objective-C, she gets a lot hits with unrelated questions. Thus, the tagging becomes useless.
How should I deal with this, when spotting such a user?