Allowing/Encouraging Banned Reviewers to View History/Stats is Helpful to the Community
If I were banned from reviewing, I would want to immediately view my history tab to see what I had done wrong and what could be improved. I would want to understand my mistakes before it was time for me to go back and review again. (In the event that I thought I was wrongly banned, I would also want to figure that out while I was still banned. And with this information, I might come to the conclusion that I was not wrongly banned.)
It would be especially handy for me to see the posts I had reviewed recently, and look at what other reviewers did with them.
It's somewhat less important that people be able to view the stats, but that is still important. Another thing I might want to do would be to look reviews by others--especially top reviewers. By comparing my practices to theirs, I might come to see what I had been doing differently.
Fundamentally, even if providing access to history and stats were not basically helpful toward helping people review better, there would still be no good reason to disable the history and stats links. All the reasons people click them are applicable to people who, for any reason, are not reviewing posts right now. I can look at the history and stats pages for review queues where I cannot currently review posts (because I've hit the daily limit, say, or because I've run out of votes of some kind or other).
There are only two sorts of reasons that would make the current stats and history link behavior correct:
- It might be correct if people who are banned from reviewing were able, and likely, to use the information there for destructive purposes. This seems implausible.
- It might be correct if it were intended as a punishment for reviewing poorly. But the purpose of banning people from reviewing is not to punish them. Furthermore, this would be a counterproductive punishment--as explained above, it isolates people from helpful information about how to do better.