Pseudonyms or real names

Here's an article written by skud arguing against someone on Hacker News who suggested usage of real names be enforced.

Skud has written extensively on the subject, and has been cited all over the place. Notably, they're mentioned in this EFF article:

https://www.eff.org/deeplinks/2011/07/case-pseudonyms

And they're cited by this Op Ed published in the Communications of the ACM:

https://cacm.acm.org/opinion/the-politics-of-real-names/

I'm reminded of that Hackers (1995) quote:

I need a handle, man. I don't have an identity until I have a handle.

What's you opinion on the matter? Do you think everyone should be using pseudonyms for security? Do you think it'd be better that everyone use their real names online? Why or why not?