Pony Fantasy VI Remake

Not a big concern, I binary dump my events anyway to keep a separate record of them, but it does make me wonder if storing events there is safe, that this happens?

I think I answered this in your previous life (Pony Fantasy first iteration). FF3usME store editor settings there, it's not data that is for the game. The worst that will happen is someone wanting to cheat on your hack, use FF3usME and destroy / bug some events thus making ironically his game unbeatable.