Just a question which came in mind just after read the instruction page and seen the chapter about the uninstallation. Would you interested to use the MageTrashApp module? See https://github.com/magento-hackathon/MageTrashApp
Yes I would. I wonder if people would understand they have to install another extension in order to be able to cleanly uninstall another? have you got experience about that?
I install the module MageTrashApp with the extension Diglin_Username and put into the doc information about how to uninstall: https://github.com/diglin/Diglin_Username
In git I put the MageTrashApp as a submodule and in composer set that it is a required module