We can vote _up_ and _down_ for Questions and for Answers, but we can only vote _up_ for comments.  As some comments are worthy of _down_ votes, this is a feature suggestion to add the ability to vote _down_ on comments.

One question for this feature though:  What should the minimum _reputation_ level be for a user to be able to cast a _down_ vote on a comment, should such a feature be added?  I'm thinking that it might be wise to have a higher reputation requirement than for voting _up_.

Thanks in advance.