As long as these lefty dweebs get a nickel of tax money, you're contributing member - at gunpoint.
NPR and PBS are outlets for a brand of mushy-headed liberalism even more overt than that served up by the commercial media. Not that a radio station that runs spots all day saying "This segment of 'Stealing From Working Folks' made possible by the generosity of Dave's Upscale Air Mattresses; Floating your fat liberal ass around the pool in bourgeois comfort while you wallow in false sympathy with proletarian revolutionaries the world over. Dave's Upscale Air Mattresses, with locations to serve you at Oakwood Mall, Fernwood Mall, Bentwood Mall, and the Galleria." isn't a commercial station. It's a commercial station that supplements its lousy ad sales (understandably so - how many fresh-baked brie kiosks are there outside New York and San Francisco depending on TV and radio ads to find customers?) with mendacious begging.
With the growth of cable TV and the internet, they offer nothing that isn't available in better quality commercially, other than a venue for Bill Moyers to peddle his atheistic pseudo-Methodist tripe to gullible post-Christian chowderheads. For pete's sake, the local PBS station periodically runs hours-long infomercials with book tie-ins for Gary Null, Suze Orman, and Steven Covey (or a Steven Covey look-alike huckster) with book and product tie-ins to what is presented as a serious lecture. Let 'em sell enough overt, identified ads to survive without tax money, or sell their licenses to the highest bidder and burn the buildings down with the staff's Che Guavera, Yassir Arafat, and George McGovern posters inside.
I do not contribute to my local public broadcasting affiliates.