Actually I can make it so the key won't start it, it will only be useful for turning on the electrics & unlock steering etc (only make the "ON" be active) so the button MUST be used. But I kept it simple, can use both. BUT YES, you require the key.
Cmon, like every other useless mod, it's just for being extra:
Why get new alloys, car already has alloys
Why upgrade headlights to HID, car already has headlights
Why make an eject button, can kick someone out by leaning over opening the door then elbowing them out
ETC ETC ETC
(ps I'm getting HID installed in a few days when the pack arrives)