Apparently there were 500 of them, a swarm of janitors in purple and yellow t-shirts making their way around the sprawling headache known lovingly as South Coast Plaza. They were scheduled to gather at noon on the corner of Sunflower and Bristol and then march to some undisclosed location and hold a rally. This would be the second march this week, a big gathering of unionized janitors calling for fair wages before next week's negotiations with the notorious B-R-E-N (Don, of Irvine Co.) and to sh