Has anyone seen this? Would be quite interesting if it was real. According to the link, it details an app where you can arrange your own kidnap. Although the app does not exist as of yet.
Looks like something that both could be very fun for both taker and waiter and a lawsuit waiting to happen against said taker. All that waiter has to do is say he/she said their safeword and that the taker ignored it. That's a real kidnapping charge... so anyone thinking of partaking in this, be very careful...
Is it any different to be tied up vs being tied down? One of the great things about English, its flexibility :p
The only way I can see this working is if you get together with your kidnapper (or taker, I guess) and meet and talk with them beforehand so you know exactly who the other person is. Even then, there are just a ton of things that can go wrong.
I think this is something that probably should be left to fantasy. Maybe there's a way to pull it off, but it's incredibly risky.