the trap is more satisfying
the trap sound is the most satisfying thing in the entire game
TCHNKTHUD
They'd have to be stupid to let it happen though. Literally... if one of you heads outside the plane on a certain approach and they get the 'enemy outside alert', they'd have to be really silly to approach that side, or at least not to approach it cautiously.
Most good teams seem to use the top of the plane as their entry way now, or at the very least, the windowless side. In turn, a trap placed under the hatch at the top of the plane can be quite effective, and at the very least provides you with an 'alarm system'.
The balcony on bank which overlooks the back alley spawn, would you people consider going there as a defender to shoot people as spawn killing? I killed someone standing still droning as their first thing (I assume they didn't move), so it looks you actually see their literal spawn position once you're on the balcony. On the other hand, it takes a few seconds to move onto the balcony. That's not a lot of time, but it is enough time to move into cover or start aiming at the balcony.
I wish I could experience the situation from the side of the attackers to figure out how easy it is to defend against that kind of attack.
Yeah you can see them if you run out. You can do that on most maps in the game though, if you're willing to run out to a particular side, you can see them as they spawn, but obviously there's a degree of risk involved. I haven't done it on bank in that way mind you. I usually wait to get them on the cameras then hit them at the doorways below, but I may try it.
If you have a coordinated team that has one guy on cameras and 2-3 other players covering each spawn, you have a very effective alarm system for their approach, and you can certainly cause them some trouble. I don't think it's unfair, but it does play on peoples sense of security when they are outside. Something that good players won't have, always checking outdoor windows and waiting to hear them opened up, etc.