It's probably been discussed. I imagine the conversation at head office went something like

Ok so US style mailboxes, good idea?

Yeah really good. Safer, dont have to go in the garden. No dodgey gates or fences, dogs! From a health and safety perspective it makes great sense.

What about when people start sticking severed babies heads in them?

Ok scratch that, next on the agenda. Shorts in all weather. Does it promote the right image?