It's not the cool jumpsuits, or the Ecto-1, or even their experience with Slimer, the green gourmand that has a juicebox named after him. They get sucked in the trap and sent off to the containment unit back at the firehouse. Ghost Trap - Ghostbusters Costume Accessory Take the simple Ghost Trap, for instance.
Yeah, there's just no way to make a proton beam safe for mass-consumption. Unfortunately, when our in-house designers were putting together a real-life neutrona wand, there were some serious issues. Cosplay Proton Pack Backpack w/ Wand Ghostbusters It's your haunting, you decide what to wear.