Below is an article in regards to online harassment. It makes some very valid points.
By now, Yoshida-san and the dev team are well ware of the harassment that occurs in and out of DF.
Stopping said harassment is a difficult task since it requires a solution that isn't easily exploitable.
My suggestions, more than question, is that Yoshida-san and the dev team read the article and see if any of the solutions presented in the article can be adapted to FFXIV's harassment problems.
http://www.wired.com/2014/05/fightin...ne-harassment/