I don't get their stance ... peer-review is already "anonymous". There are also a lot of issues with truly anonymous user forums (see 2chan and 4chan). For me it always seems as if the social aspects of communication disappear when one is truly anonymous, e.g. hate speech. The problem is not lack of anonymity but lack of incentives for reviews (I don't get anything from doing a thorough review of a paper and often it's hard to impossible to judge the contribution without dataset and code). It seems peerpub and similar systems will attract people who have the incentive to attack specific authors (as it happened in this case).