In the recent spring cleaning effort, I have found a fair amount of questions that are character recognition requests.
The Help Center page currently states that direct translation/proofreading requests are off-topic, but says nothing about character recognition.
The majority of these questions are similar to translation requests, in the sense that they are unlikely to be useful for anyone other than the OP. However, some of them turn out to be about a common kanji shorthand or cursive script, which can be useful for everybody. (Although it may be difficult for a future visitor with the same question to find the page via search.)
Should there be a rule in the Help Center document about this kind of question? If so, what would be the rule?