The new Facebook commenting system requires you to log in to Facebook in order to leave a comment on a site (that is using the plug-in). Therefore, the 99% of comments that this blog receives (as well as most others) that are spam, might be dramatically reduced. So too might be anonymous bashing, a stall worth of the web. Dave Fleet points out these and some other compelling pros and cons in his recent blog post article: http://davefleet.com/2011/03/facebook-commenting-platform-pros-cons-business/.