Instead of just nerfing a beloved feature, I see this as a great opportunity to add another custom brew. A brew that makes the player totally  invisible to /near.

Instead of a very cheap brew (invisibility), trumping a server supporting cash payer, lets add a custom brew. This will add content, stimulate the economy,  and make people apply a small amount of effort (aka) play.

May I suggest the following.

Name- “Ninjas Shadow”

Brew- 3-5 potions of invisibility

3-9 sea lanterns

1 ink sac

Distill 1 time

Age 1 year

Hints. 3-5 potions of vanish, 3-9 ocean glows, 1 Sac of darkness. Brought to a boil. Left in the dark for a earth cycle.

Thanks. Hope this adds content to the server.