The existence of users has a tangible ripple effect on the game's economy.
FMing is the process of modifying or adding stats to an item using at a Smithmaging workshop.
Ankama deliberately creates obscure FM scenarios (e.g., a rune that behaves unexpectedly in a patch). Bots that do not update immediately will perform illegal actions, flagging the account automatically.
However, the keyword is also a trap. Many websites claiming to offer these tools are actually vectors for malware, keyloggers, or phishing scams designed to steal player accounts.