To be honest, you should always listen to the member of staff regardless. They know what they're doing and aren't just out to get you, therefore if they ask you to do something it's probably in your best interests to follow their instructions.The same goes for if staff send a guest away from a ride for whatever reason, be it height or any other restriction. I don't think it's fair that staff should get grief for doing their job. It spoils their day, it can spoil the guests day and it doesn't exactly encourage staff to interact with people.It's a fact of life that not everyone can do everything. If you're too short, have too large a waistline or cannot ride due to disability then arguing will not solve achieve anything.