My sister, when she was like, four, always liked to just take klenex tissues out of the box and leave them around the house for no discernable reason. When confronted, she would claim "a ghost made me do it!"
That's how I see Wu acting here. Besides, if the account really had gotten hacked, we all know the ones responsible would immediately change the password, post far more troll posts to annoy Wu and anybody still taking them seriously, and spark a chain reaction shitstorm between Wu and her contacts within Twitter since they "allowed" GGers to compromise that account.
It's also likely they'd have spilled a shitload of content because if they got into the normal account, I have to guess they'd figure out how to get into the private account as well.