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Re:Ask HN: How to easily check if two words are too close by data37 on Friday August 05, 2016 @05:15AM (#12230926)
aha - got another idea. I'll just use a different format to display the admin comments. So the imposter can't mimic the format, though they can use the same username.
Re:Ask HN: How to easily check if two words are too close by niftich on Friday August 05, 2016 @03:21PM (#12235088)
This is frequently done on (pseudonymous) imageboards, as well as chatrooms and the like. The admins have a password/key that when provided, enables them to be displayed differently, like an additional image tag, or a separate nearby text element saying [ADMIN].

This is coded into the server-side site code, and normal users are not able to inject content into that other element to masquerade as admin.