Tell her to get over it...As harsh as that may sound. The internet is a shitty place where people's true personalities come out because they can hide behind a computer screen. The real world much worse. She'll need to face critiscm and know how to deal with it eventually and develop tough skin when it comes to things people say.

I started playing MMOs when I was about 13-14 with MapleStory back in 2003. That game was a shithole when it came to the community. FFXIV is one of the better ones with the bad apples being few and far between (at least for me). Just blacklist the a-holes and keep it moving.