"It" can happen anytime someone changes a switch position without first making sure that the correct switch is being operated. I doubt that Airbus or any other type of aircraft are exempt. Why would anyone want to bring the A versus B argument to a thread that applies to ALL machines?
Because it cannot happen in an Airbus. Airbus don't have trim switches (well, there is one). The ergonomics of a modern airliner is a very important safety feature. Airbusses have so few switches in the cockpit that you would really have to make an effort to mistaken one for the other.