Yeah true. But I honetly don't think it was her intention to interfere with how they were going to go about it I think she just had an emotional reaction. It probably reminded her of how she was essential taken and sold against her will. And even though her relationship with Drogo has grown into a loving one, essentially her brother sold her as a sex slave. So when she sees the women being gathered to be sold and raped she feels for them because, though not as violently, she's been thru the same thing. And yes even though her helping this particular tribe might not be the best idea considering they need slaves to trade, her compassion is what makes her the best candidate to go to Westeros and take the throne. Like her brother said "who can win the throne with out money, fear, or love" The mad king lost his because he ruled with fear. The Lannisters, until Jeoffry took the throne, never ruled even though they have more money than any other kingdom. Dany has the best chance because her compassion will make people love her. And a kingdom is known to follow their King/Queen to hell if they love them. And she won't have to warry about the war side of it cuz like Ozy said, she has Drogo and his army to handle that.