I understand the request, but I hope that doesn't happen. There's a handful of things (besides furniture itself) that only the owner can display in his/her house; loot, bugs, and mounts. Let's keep it that way.
I mean let's be real, the main use for the mount post furniture item is for players to show off their most "prized" mounts, anyway. Take that away and it makes showing off rare mounts much less special.