Devils advocate. (Score 2, Insightful)

Any time you provide a tool like this, it has the potentiall to be used against the owner as well, especially if someone else with access to the equipment understands the tool better than the owner does.

I can see several scenarios, some more plausible than others where another party might be inclined to use it to lock the owner out of access to his own data.

Yes if the other party has access to the machine, they can always cripple it by other means but the beauty of this is that it can be used even after that party apparently no longer has access.