" Most demons are as dumb as a sackful of hammers. This does not mean they’re safe to mess with, any more than a C++ compiler is “safe” in the hands of an enthusiastic computer science undergrad. Some people can mess up anything, and computational demonology adds a new and unwelcome meaning to terms like “memory leak” and “debugger.” Now, "

― Charles Stross , The Jennifer Morgue (Laundry Files #2)