Board Thread:Suggestions forum/@comment-26410366-20160203205206

A new block for gates would be crafted with a gold key and a normal gate block. The new block would be a key hole, a way to lock gates out to other people on banners, useful if you play on a multiplayer server and cannot place a banner in your house. The gold key would be bound to that block, and would be crafted with 4 gold ingots in a pattern similar to a helmat, but without one of the gold ingots in the center row. The gold key could be crafted with other unbound gold keys to create other "master" keys for that block. It could also be crafted with a silver or iron key to bind them to the block. The silver and iron keys would be crafted the same way, but with their respective materials. The silver keys could bind iron keys, but the iron keys would not be able to bind any other key. You must have a key to have the ability to open the gate. This would override banners, and allow more presise control over who gets into your house.

I apologize if the fourm is still closed. 