I never understand why people get so vehemently cranky to others in these threads, when you may not know who they are, and perhaps it is someone you flew with last week. Chuck said, "enlighten me," so I did. I don't feel the need to look up someone's name on the seniority list, especially since people can put any name they like on here. The questions he asks do sound like someone who is new, or doesn't work for the company.
That said, I've talked to some guys who are fairly senior and know almost nothing about trip trading. They manage to get great schedules without the same misery and constant effort that most of us do. It does surprise me when people have little clue of how trip trades work, but if I was able to hold one of my top 100 bid line choices, maybe I wouldn't be familiar with it either.