Comment by tsumnia
It can depend on the field and the methodologies that are used - there's been some papers I've reviewed that I could assume who they were based on the contents. I can't really offer a counterpoint on non-blinded reviews as I've only done blind. I have heard some reviewers use the anonymity to be particularly rude, but I've only ever experienced that once but I used our 'discussion' phase to express my concerns.