It's an effective way, but generally a very bad one. I used to work in telecoms, and some idiot took down a tunnel between the UK and Germany carrying 1kB/s of

It's an effective way, but generally a very bad one. I used to work in telecoms, and some idiot took down a tunnel between the UK and Germany carrying 1kB/s of RADIUS traffic because someone (the idiot) owned the link it ran on and had failed to record the formal allocation of this tunnel to a production customer-facing public access WiFi service I ran. I on the other had remembered to record his telephone number and his boss's telephone number, and a certain amount of screaming went on. Moral: before doing a scream test, make sure your own documentation is watertight.