I believe at least one 0 rating needs to be given because the rule is that if the average rating is below 1 the comment gets hidden.
This means it is possible for a hidden comment to be unhidden by receiving more 2 ratings than 0 ratings. Can the last politician to go out the revolving door please turn the lights off?
"If several members give this warning, causing the average rating to drop below 1, the comment will be hidden from public view." You can't be me, I'm taken