In town I was thinking it would be a good thing for trapped chest to be able to have to have sign shops on them It would be alot easy to make a fit able shop in a small amount of space like in a corner of a res or some thing instead of Taking Up your Whole Res.
This has been filed on Track as a bug by Aikar: http://track.empire.us/issue/EMC-34 He's marked it as fixed, which means the feature is now available, or will be in a future deploy.