Michelle Malkin and Instapundit are the only ones I'm familiar with that do not allow. I know personally that both respond to email, faithfully. There are reasons for both, different reason, they disallow the comments. Instapundit for the reason that his is mostly a linker; Malkin because she was harrassed for being a minority women, and Uncle Tom if you will for Fillopinos and women in general. With the nonsense waging on the issue of Cheney and some others, this canard is again being tossed forth. Lots of links. There are reasons for closing comments. Here is a response.