Zetectic had a video on his channel where Ben and that freak Leaf were talking over a black screen, pretending to be some hackers of XTREME POWER!!! It was deleted for some reason. He mentions DDoSing people, brags about a bunch of stuff no one cares about, etc.
DDoSing takes even less brain power than winning a GST, just for the record. You have no reason to be afraid of someone like that. Skype caches your IPs, they Google "Skype resolver" and type in your username, then they either pay for a cheap booter or just use a Google search to find public shells.
If you're under the impression that people like him are doing something that requires any sign of intelligence, nah. The safest way to not get DDoS'd is to not give your Skype out to idiots, just connect to Skype through a SOCKS or something.