Well if your competitor used GitHub for (source control|issue tracking|deploying from a GitHub repository) you could DDoS GitHub (bit of colatoral here and there) for some illegitimate advantage.
Law enforcement would have to work up the caring to actual track you down. There are hundreds/thousands/tons of [D]DoSs launched everyday from 10MB/s to colossal 400Gbps attacks. 99+% of attacks aren't going to be investigated.