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.