We quote: "You may not use any "deep-link," "page-scrape," "robot," "spider" or other automatic device, program, algorithm or methodology which does the same things, to access, acquire, copy, or monitor any portion of the Southwest web sites or any Company Information."
Perhaps Kayak is hoping that Southwest will look the other way, since technically this is not a side by side comparison.
This should be interesting. If nothing else, it will get Kayak some media attention.
Note: Airfarewatchdog.com reports editorially on Southwest Airlines' fares, but does so without using any "automatic device." Instead, we just use real live human researchers to see what they're offering on any given route on any given day.