Watering from the bottom promotes root rot, kills the roots and beneficials near the top (unwatered) zone and prevents the proper formation of roots. Not positive about the effects of wicking, (feeding from the bottom) but I do know that when you water from the top, air is drawn-down into the root system via suction from the water.

If you piss-off your ladies often enough (dehydration, for instance) eventually they'll reach the tipping point.