@JourneyIntoMystery - I know it seems silly, but in movies and animated series some of the characters would have some of their things. Or their belongings would be in storage.

@JourneyIntoMystery - A good example would be two face...he is typically shown in Arkham with coin.

@JoeMomma29 - Two Face with the coin is the first thing that came to mind haha. Gotta love Arkham.

@CrazyCipher - I was going to say almost this exact same thing.

They let them keep some things because taking them away would lead them further down a path of insanity.

They kind of explain this in the Arkham Asylum comic. They go into more detail with Two-Face. They let him keep his coin as a way of therapy. Then they slowly started integrating other items for him to use to make choices, so they took away the coin and gave him a 3-sided dice. Then moved on to something with 4 sides, then 5 sides, etc. The sides of each object representing another decision he can make.

They tried this in an effort to eventually not give him anything hoping that he would be able to make decisions on his own, without an object. But as soon as they took his 8 sided object he lost all form of sanity and totally reverted to a scared, child like state, complete with wetting his pants and everything.

So there is a reason they give them their things.

With Ventriloquist it's probably similar. He can't really make any decisions on his own without Scarface giving him the order. So I could totally see them letting him keep the dummy for a bit while trying some kind of therapy.

@HulksPenis - Wouldn't HulkPenis break the bed if he got up in the bed?