I suppose I could get super serious about it and learn everything there is to know about internet protection but holy shit, all to play a game fairly? Jesus guys, some of you need to check your ego. If you can't handle losing a game of starcraft, that is a clear sign that, in plato's words, You're a slave to your "self". You seek control of external variables because you lack control of your self/ego. Thus you are a slave to it and will be a permanent prisoner to the fragile construction of beliefs your ego rests upon.
I can handle losing games, but wasting my time only to be Ddos'ed is another story.
Food for thought.