I agree that the huge signatures, to me are irritating at best. I like to see the signatures, so I prefer not to turn them off totally, but the ones that are so big they take up half the page, or you have to scroll over to even read posts, that is over the top. And it takes me a good while to load a page if it is full of the big signatures.
I think it is only fair to have a descent size limit to the signatures.