You can't hold the people from not talking about yinyang and associating it with Harmony. It's honestly better to get the rep of yinyang fixed so it can be a positive association. If you are going to buy out yinyang afterwards, you might aswell do it before anyway... You don't even have to fully buy it out yet, if you buy enough to set the wall at 375 satoshi, its reputation would already be stronger. i've been buying some yinyang to strengthen its wall already but i'm not gonna buy too much, you can use the BTC you spare from buying it cheap for mintpal.
I've edited my last post a bit, just wanted to check if you read the things i added ?
I would prefer for Yin/Yang to be very little associated with Harmony though. I will personally buy up Yin/Yang after the IPO is over. At that point people can invest into HarmonyCoin if they desire.