The article is mainly made up of a series of unconnected beliefs that have no evidence provided to back them up.
One for example would be that anorexia has been repackaged as fun feminism and the writer says we can see this all over the web. I've never seen it. It is certainly true that feminist ideas have been used on side of an argument about what causes anorexia and how it should be treated. Similar arguments have been put forward about self harm. I don't see these activities as being fun. Authentic perhaps, but fun?
I do not see an issue with Sian Massey not having commented on the remarks made about her. It isn't her job to comment on such remarks and it is entirely her decision as to whether or not she wishes to comment. She may have decided, that given other people have deemed the remarks sexist, there is not benefit to herself or women as a group in adding further comment.
To be honest, if I got into a debate every time I experienced sexism, debating would be all I ever did. We do all have lives to get on with. Sometimes sexist remarks are made in order to get a response and waste women's time or to monopolise their attention. Sexist remarks of a sexual nature are often made in order to get women to complain and talk about sexual matters. The poster on AIBU whose friend used a prostituted woman in Thailand; did he really want a debate with his female friend or was he just looking to get a sexual kick out of discussing his sexlife with a woman?
I don't feel the need to dignify every sexist remark with a response. Neither should Sian Massey or the women who work at Sky. Added to which of course is the risk to women's own economic and physical safety if they object to such remarks.