Mod users in FFXIV are getting out of control

[KisaiTenshi]

Indeed, but it most certainly isn't writing to the game client's memory which was what was implied.

The ACT plugins can read and write to the game memory, just because the FFXIV plugin doesn't do it, doesn't mean another plugin can't import data from the FFXIV plugin to write back.

Likewise, there is no way to get consent from other players that the parser is being used against, nor is there a way to block people from parsing you. If these "battle logs" type of programs wanted to be legit, they would do nothing but write the player's own combat activity and ignore everything else.