It won't work! At least in my experience it hasn't.
It will do something like this.
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isaac_rocks (aka bionic), 10 months ago
It doesn't work, you're right! On my page sometimes the "Unsubscribe" button pops up to the top comment, so there is no "Unsubscribe" on the bottom, and 2 at the top. I'll make a post about it.