My gut reaction was that as a browser extension, you would have the ability to add airlines that refuse to participate in the current travel sites, e.g., Southwest? But I don't see them in the results...
Your gut reaction is not wrong. That being said, I think it's wise to pick the right time to leverage this capability. Our resources are extremely limited at the moment in comparison to one of the most aggressively litigious entities in our space.
Southwest fares integrated with other airlines is pretty much the reason why I'd install something like this. Also, getting sued might be good PR, you could probably spin that into some great news coverage. Streisand effect.
