I know that this is a forum to speculate about aviation issues, but do we have any knowledge of the previous incidents where a similar problem occured?
I think we should like look to what was in the PNF mind to do such a thing.
I am Bus Driver and it's hard for me to get an explanation how could oneself mistake the flap lever for the parking brake. The levers are different, operate in different ways and give different indications (Landing memo would show flaps 3).
However, I agree on software change (ECAM) to indicate the pilots when parking brake is on without WoW.
Check Six krueger...