Not according to their own system they can't and it's not up for debate either: http://feedback.uservoice.com/pages/1-general/suggestions/28268-allow-anonymous

Not according to their own system they can't and it's not up for debate either: http://feedback.uservoice.com/pages/1-general/suggestions/28268-allow-anonymous-comments?ref=title http://feedback.uservoice.com/pages/1-general/suggestions/28...