When I review code, the checkbox is set to "reviewed" by default. This is dangerous (you view and leave the code diff, and the code gets "ok" reviewed). It should be unchecked by default .
If possible, the standard setting ("reviewed=ok" or "reviewed=not ok" by default) could be perhaps become a user preferences option in the "Gerrit reviewer preferences", if you understand, what I mean.
Version: unspecified
Severity: normal