I see no utility in applying stake as a metric. It would make far more sense to me to use rep. There are several stakeholders with far more stake than any reasonable stake threshhold that could maliciously manipulate such a mechanism profitably. Reputation is not so potentially manipulable, and is a more meaningful metric regarding trust. Rep threshhold could be set to, say ~250, which would require at least three high rep accounts to report a link as sketchy, while dozens of accounts possess enough stake to surpass any reasonable threshhold based on stake.
Otherwise this is a great idea, that may well keep people safer on Hive.
Thanks!