I remember this happening on FFXI to a friend in the linkshell but the GM actually showed up warned him next time it happens he will be temp banned and warped him to GM jail for a few hours.

Here I don't know if GM's walk among the people.

I remember once I fell into a glitch in FFXI in a pond near windurst I could not get out, nobody was on in Linkshell and I had no warp on me so I was boned, So I shouted I said anyone help me get out of this hole please and someone shouted sorry I don't have high enough black mage, all of a sudden a GM appeared glowing and zoned me outside and said he would report the glitch to the dev team.

Now FFXIV GM's should start walking among players so that if something happens and they Get a GM called on them they appear or put the said harassing person in a GM jail.

I seen video's on youtube about GM jail for FFXIV but never see them appear.