As a general note -- I've enabled revision and log suppression for oversighters on all Wikimedia wikis.
This allows for the edit comment, page text, and username to be hidden individually, and optionally to choose whether to also hide it from sysops.
The two big differences from the traditional oversight system are:
* The entry remains in place in the history or log view -- it's not secretly vanished as though it never existed. The offending details only are suppressed from view.
* Log entries can be done as well as page edits.
This'll allow the existing local oversighter users to handle log-spam cases which previously requires developer intervention to clean up.
This system can be extended with a second tier so 'regular sysops' can also suppress individual revisions but can undo each other, but I haven't enabled it yet. (It's been in place for some time on http://test.wikipedia.org if you want to try it out.)
-- brion