Regarding fake taxis.
Most fake taxis are going to be doing it to undercut the prices of real taxis and private hire services. If you sit in a bay and pretend to be a taxi, anyone could get in for a ride, and it's not likely to be the type of person you're 'targeting' if this is a ruse to pick up a certain type of person.
As for abduction of someone who's tall, young, strong, fit
One way to do that is to have two or three guys jump out and bundle the person into a van or the back of a car. Another way to do it is a ruse, and this can be done by one person. The simplest ruse here is not a fake taxi but someone driving by and offering someone a lift. I think this scenario is unlikely to be particularly well-planned and not targeted down to the individual level, we'd have to be looking for a 'type' of person if we were driving around on the offchance that something might catch our eye and an opportunity present itself. And the opportunity might not happen tonight, that might be part of the adrenaline buzz that you don't know if tonight's going to be the night.
Once the pick up has been made, the driver's adrenaline is going to be buzzing even higher, but if the ruse was good, then Corrie's adrenaline levels could be pretty flat right up to the point where it's blindingly obvious that he's being attacked, which might not be until an attack has already started, and this can give a massive advantage to our hypothetical perp.