The e-mails are important, but don't put all your hope in them.

The underwriters of WETA program are the ones to reach.   

Trust me, station management is prepared for a deluge of e-mails from listeners, and I am sure they have calculated how much it would cost them if they had to return the donor dollars.

It is less likely that they have prepared themselves from organized boycotts of the underwriters. As soon as the first underwriter cancels their support, changes will be made. Loosing that support will scare the hell out of them. That suppport is how they base their programming, not on the number of listeners to specific shows.