DoB will have to deal with some problems, especially bad actors; people will squat on domains, register typos (fscebook.com) or even bitflips (fabebook.com, b is one bitflip from c). Malware owners will run their C&C servers on domains.

Malicious domains will require someone removing them or blocking them even, unless you want the DoB namespace to turn into a cesspool of malware, phishing and nazis. Not something the average person wants.