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The backend can do that but the frontend does not .. if you point me to a nice UI element to offer that feature, it can surely be added ..

Could it just be a locally-saved text box where the user would enter -100 to 100 to save a default vote? (negative numbers would be useful for spam fighting)

How about these:

I't love to have one that you can adjust with the mouse wheel.
I will also make it possible to

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