Good questions, and I don't know the answer. My general feeling is that there are many ways to be a dick which aren't illegal, only because nobody has thought

Good questions, and I don't know the answer. My general feeling is that there are many ways to be a dick which aren't illegal, only because nobody has thought of them yet. If you pulled this stunt one day you'd get away with it. But if people started doing it on a regular basis then either somebody would find a way to punish it using existing law or they'd pass a new law to deal with it. Because that's what we have laws for; to stop people from hurting others by being dicks. DDosing is a brand new (on certain timescales anyway) way of hurting other people by being a dick. If it's not illegal then it should be.