I believe that there are simple modifications that could be done now to the existing system. Namely, why are reviews typically single blind, where the author d

I believe that there are simple modifications that could be done now to the existing system. Namely, why are reviews typically single blind, where the author doesn't know the referees, but not double blind? Certainly, the reviewers could figure out who wrote the paper based on the context, but it seems inexcusable that we don't even attempt to remove this bias.