Some potions like swiftness are good for quick building, but this potion is plain annoying. Invisible potion. People use that and they go into plots to start harassing people. Because they are invisible you cannot get their name tag so you can ban them for the plot. The staff cannot really help this either. So that is the best way to do it. I know sometimes people use that for games, but still, this has happened to me and many others, its even good for griefers so they are not caught in the act.
As long as you don't have hundreds of people added to your plot you could just remove everyone or deny everyone until you know who it is. There is really no need to get rid of this potion. It may be annoying but removing and denying everyone from your plot is an easy fix.
If you are doing a rp, it is really nerve racking. On survival and kitpvp keep it, but on creative it just annoys people. I once got muted Because the staff thought I was doing it to my own plot, so I do not want anyone else to do it. I remember this happened to someone with a school rp, someone went and followed everyone and started destroying it.
Nice idea, but how about instead of removing the potions, add the /near command so you can see who is around you, and know who the invis people are. Just a thought
Go into /gm 3. You can see invis people... and /near just lists the people around you and how would you know which person is invisible.
It would just be easiest as the first person said, just don't have 100's of people on you plot to RP and only a select few and you won't have to worry about it
how about as long as you arent trusted to a plot you cant use invis potions and if you are already invisible you can be seen in plots you arent trusted in (except if you are staff then you can override that)
So /near [] would need a substitute of something with plot me to say players on the plot, not just near you. So it could be added to /p i (info)
There should be something added like plot settings. You have the ability to ban certain items from your plot. That would prevent invis potion people from doing that.