Role Playing
Warcraft is a Massively multiplayer online role-playing game (MMORPG) -- in fact it is the largest with MILLIONS of players. Note the "role playing". You play a character. The things you say are not from you, but from your character. So anything she may or may not say while playing the game is irrelevant to her job or anything else.
Any murders committed in the game are fantasy - in fact they are not even permanent as the characters come back to life in a few seconds.
People up in arms about this have too much time on their hands. Grow up. Pay attention to your own lives and how you are behaving and less time on what others are doing. A video game is just a game. It may take up gobs of your time, but it is harmless.
If Colleen is unfit, then I guess the other 10,000,000 Warcraft players are unfit as well, yours truly included.
If anything, being a Warcraft player means she is tuned in to technology and modern life, and as such perhaps she is a better choice to run for office than stodgy thechnophobes.