Southwest Airlines- Endagering Lives

I have been trapped on a Southwest flight scheduled to depart from Baltimore (BWI) en route to Sacramento, CA. I have now endured more than 7 hours while 2 first officers and 1 pilot have "timed" out while sitting on the tarmac. While the first few hours were clearly due to weather delays along the East Coast, the last few hours appear to be demonstrating a complete breakdown of the Southwest system and exposing problems that could endanger lives. It is obvious that Southwest is pushing the safety limits of its crews if the FAA rules cause the crews to be running so close to their time limits. The pilot announced that he had already been flying for 15 hours today.