I blame Fox for much of what we are dealing with now. Without Fox, trump would not be in power. They are the propaganda machine. Instead of sending a postcard directly to them or calling them, it would likely be better to go after their advertisers and businesses that play Fox in their waiting rooms.
It wasn't easy finding a list of advertisers and I definitely didn't want to actually watch Fox to see who had commercials there. Finally, I found a site with a current list - WhoAdvertisesOn. By the way, no matter what search terms I used on DuckDuckGo, they mostly wanted to send me to a Fox online page. When I searched on my preferred search engine, Swiss Cows, I found a number of sites with the info I was looking for. DuckDuckGo tends to have the same list as Google, but doesn't track you. Swiss Cows doesn't track AND their hits are less biased and less corporate leaning.
I looked through the list of advertisers and decided to start with Force Factor. I have been using their Total Beets for the last few months. My Fox-watching parents had recommended them to me so I should have known they'd seen them on Fox. Dang it. Anyway, I won't be buying more. I found several alternative brands including HumanN. I won't miss Force Factor at all.
Contact Force Factor:
280 Summer St,
Boston, Massachusetts
02210
1-800-429-0415