They need to find a way to detect XIV Alexander and ban people

[NzomiKujo]

The only way the GMs/STF would be able to detect the use of Alexander (or any third-party program) would be to install a separate software onto a player’s computer that scans each of XIV’s files and the computer’s system for these tools and/or any modifications. However, this sort of software is illegal in a lot of countries (including Japan, last I checked), and with this being a global game, SE attempting to attach it to XIV would be impossible.

They could use nProtect GameGuard like PSO2, if it detects any 3rd party program running that the game devs dont like it gives you Error 1013 and force you to close the game, crashes the game or gives BSOD. If that's not enough, implement checksum file that the game checks and updates regularly while you're online.
In PSO2 if the devs find people using parser they ban accounts without warning for cheating.

I guess the anti parser people would be happy.