So this suggestion is pretty straight forward. If this were implimented it would give the player the ability to toggle wether or not they can see the glow effect. It might be a command like /glow toggle. If the player had /glow toggle off, then when other players were using the glow effect it would not appear to them. This would be helpful because I know from personal experience that seeing someone with the glow effect will bring down some players' fps drastically.