I think you might be misunderstanding what a cutaway lock is. A cutaway lock is a normal lock with portions of the casing made out of transparent material or removed entirely. Their specific function is to practice lock picking. And blank keys aren't tools with a single usage scenario. Good guys and criminals alike use them to copy or make keys. The important thing here is not to judge by the equipment, but by the intent of the owner. Most laws about owning lock picks reflect this pragmatic view.

Also, if you're attempting to criticize the activity of lock picking in general, realize that it is a long standing tradition in the hacker community. Sergey Brin is a prominent example of a "non-evil" person who tinkered with it [1].

[1] http://www.nytimes.com/2006/10/10/technology/10google.html