PBS programming does include some worthwhile programs, but almost none of those include programs on firearms.
Years ago (80's) my wife and I donated to PBS to support programs like Nova, Carl Sagan's Cosmos, Attenborough's Life on Earth, and a few other select programs. Then they aired a program on the "ring of fire" west coast gun makers (Jennings, Lorcin, Raven, etc.) and it was complete yellow journalism. I sent their next donation request back with a short letter that said no more funding until PBS publicly apologized for the outright lies in the program. I haven't donated since.
Our California "approved handgun" list is a direct outgrowth of the anti-gun movement. They demonized these guns as cheap, inaccurate, unreliable and even prone to explode when used. To "protect" citizens they created a testing process to approve guns for sale. To the embarrassment of Diane Feinstein and other supporters, many of these "cheap and dangerous" guns passed the tests. What few people mentioned, but not even PBS who often champions the poor and disenfranchised, was that these cheap guns were often all the poor could afford for personal protection in very bad neighborhoods.