Any pilot that posts a trip on the swap board as a P/U presently does so with full knowlege that his/her line will be reduced by that amount. Whether that pilot chooses to pick up open time, pick up another trip off the swap board (and if out of base were allowed that in base pilot would now have more options for him/her self), fill up by going negative on their bank, or just leave it alone is entirely up to that pilot. Just because YOU would do one thing, doesn't mean everybody would do the same thing. That pilot had their own reason for dropping that trip and the swap board is what gave the pilot the flexibility to fix his/her schedule the way he wanted it without the company getting involved in any way whatsoever.

You are quite welcome for the clarification.