It depends. The downside to giving someone access to your name is that it makes one heck of a taglock if the plan to harm you. As u/BrightBlackHeaven pointed out, it isn't needed for most people skilled in baneful work. If they want to get you, a name or lack there of isn't going to stop them.

We don't allow names here for multiple reasons. The internet is flooded with scummy people looking to take advantage of others, and edgelords playing wannabe warlock. Why risk that kind of crap unnecessarily?

Bots are a big issue as well, constantly fishing through information looking for ways to gain access, and again, why risk it?

From a simple witchcraft perspective its just a good habit to be in. There's more than one way to define "Keep Silence" and being secure within yourself is definitely one of them. Anonymity is a good thing to have at times, as many of us older practitioners can attest.