Definitely NOT a badge of honor, as Meg notes below. As a brown midlist author, it's hard enough to get the word out about my books--so if they get banned, that's it. You can't buy or borrow what you don't know exists. (And the author gets blamed for poor sales numbers and can't sell future books.)
Please remember that for every VE Schwab and Stephen King, there are a lot of banned Black, queer, and POC writers you've never heard of, to whom it is maybe not a badge of honor but a denial of their voice. Being banned is not a marketing opportunity, unless one is already rich.