Phantoms Appear Invisible to Everyone Else

Phantoms are annoying. Especially when phantoms attack you even when you're not the one with insomnia. I propose that phantoms should only attack the player with insomnia, and appear invisible to everyone else. This would mimic real-life psychological consequences that come from lack of sleep. It would appear to a player who doesnt have insomnia that the player who does is seeing things. The player also cant get help to fend off the phantoms and would be more likely to sleep.