Easy enough, If CF wanted to do it right here and now... Although somewhat annoying to be told where to go to sit, they could install a door at the last doorway into the station itself, door closes as they are loading and checking restraints, and then reopens just before the empty train emerges, they would just put a ride op there that assigns you a seat/enforces no one sees the launch (much as the Crypt ride ops unnecessarily refuse to let you watch the ride unless you actually want to ride it). One employee and a door or curtain would be all it took. The LIM sound, the screams, that's all ok for people to hear and get whatever wrong impression, without the vision of seeing it, it would still be a thrill rush SURPRISE!
The launch is way too loud when people are screaming. They should have a no scream policy on that ride. lol