If someone's harassing you, then they should be reprimanded for it. That's wrong at all costs. However, you ought to lighten up on the idea of mods. They're not really hurting anyone (unless they're using it to harass others, and the majority aren't). They're against the ToS, yes, though so are programs such as parsers, and it's simply a "as long as you don't mention it we'll let it slide" sort of situation. At the end of the day, FFXIV is a game, along with many other popular MMORPGs which is bound to have some sort of modding community. If anything, I wish some of the mods that exist could be implemented into the current game, in particular some of the hairstyles I've seen from some Instagrammers.

It's not the best of ideas to stay pressed about matters that shouldn't really concern you. Else, staying in the online environment may be detrimental to one's own health.