The Trash should never be used as a file container or folder. Anything put into the Trash should be considered deleted. Apple does provide several recovery methods to recover an accidentally trashed item but they are not meant as tools to enable the Trash to be used for temporary storage. Doing so is very risky. As such this tool should be considered dangerous and useless. Naive users should be trained in the proper use of the Trash and not rely on any tool such as this one.