The tool doesn't stop people from using facebook, it just makes their usage more productive. Like RES for reddit or other third party tooling that makes life easier for users, especially power users. Personally I probably wouldn't have stopped using facebook if I knew about this approach to cleaning out the junk. Plus the tool isn't even going as far as something like RES. the tool doesnt' add or remove any utility that isn't already there, it just automates an otherwise manual and painstaking process.