The setup is quite simple in reality.
Some of the people that apply to be on the show have a mental assessment and a series of interviews. The numbers are then reduced and according to the production company, there were 56 people on the previous series that thought they were going to be doing it...
They're then left alone not knowing if they're going to be on the show but told to make arrangements anyway, i.e pack a bag and so on.
The bags etc are all checked before it starts so they're not allowed to take money, credit cards or anything like that with them.
The morning of the filming, they are called, told to collect their bags and then it begins. There's very little time for preperation which is the whole point... No time to delete social media profiles or change passwords - Realistically, would the authorities find you based on your online activity? I can almost guarantee they wouldn't find out much about me even if they had all of my devices and even if they somehow managed to figure out all of my passwords.
The stupidity of some of them is amusing though.
The girls in the Jag would be on CCTV as it was at a motorway petrol station complete with ANPR cameras and decent CCTV on entry and exit roads.
The two army guys are cocky but predictable - Not sure why the hunters didn't just walk up to the table they were sat at instead of waiting outside. Seems pointless but there's probably some actual law about harassing people on private property or something - don't forget, they're not legally entitled to do anything that the police/security services can actually do i.e no speeding, no violence, no law breaking.
I'll apply again next year