OK this purchasable item in the shop may have some uses in ''competitive'' servers but when its used for any use that ive ever seen on these servers its to be spammed and made in a abusive way to make people either end up calling an admin, votekicking/banning the guy or making those guys leave.
Ive personally never seen this used in a proper manor and i fondly believe that it is just used to grief as i have had issues with it before with a few players named Espurr on #08, and most recent ♥Quiinix♥ on #05. they have only been to annoy the server when the players were trying to talk.
i dont think this should be in the server shop menu as i previously stated, its just getting used to grief.