Well it’s because it’s a silly idea, since it opens up to potential harassment, rather then curb it. There’s a reason why people value anonymousness on the internet and it’s not to hide because they did bad things, but to hide from people who intend to do bad things to, like doxing.
Either somebody is ignorant to this idea of what it actually does, or they are one of the bad actors they claim to be against.
Like one of yours? 
https://us.forums.blizzard.com/en/wow/t/i-got-a-24-hr-silence-for-calling-myself-dumb
Nice backwards logic here. Especailly since the same idea you’re asking for will harm you too.