Author: artificial
Description:
I tested this on my own wiki, and while blocked, I was still able to oversight revisions on multiple pages and access oversighted data.
The only likely situation where a user with oversight privileges will be blocked is in the case of a compromised account, in which case any use of Special:HideRevision and Special:Oversight will not be legit. There's a potential for mischief here, given that un-oversighting revisions requires special privileges and effort beyond that of normal vandalism reversion.
It would be safer to disable access to these special pages immediately for blocked accounts. It's at least very unlikely to impede any legitimate use of them.
(This is just a suggestion, so it can be closed as WONTFIX if it's not a good idea.)
Version: unspecified
Severity: enhancement