I'm not an airline employee, but if I was working the gate and you kept repeatedly pestering me about your VDB I'd probably offload you and then reload you into coach. That is just annoying and next time I would suggest you kindly add your name to the list and let it go at that unless you are paged.

As for the standby list you should understand that has no bearing on your VDB. The list is not an indication of whether the flight is overbooked. The flight may very well be full and there are simply a lot of people who got to the airport early for whatever reason and want to take an earlier flight. Or maybe there was a cancellation. They do not VDB people just because the standby list is growing, as the last poster noted.