Darth Id said:

Ben Kenobi's name is not a "subjective opinion". It's, like, in the movie. You know, the movie about Ben Kenobi?

Yeah, he's identified as Ben. He's also identified as Obi-Wan. There's nothing in the movie that definitively confirms which of the two names in his birth name.

Any additional speculation not only violates Occam's Razor,

I'm sure there's someone out there who thinks your opinion does the very same.

but is in fact the height of obsessive, fruitless fanboy obscurantism because it's all an elaborate solution in search of a puzzle.

"Ben" being the alias isn't any more-or-less an elaborate solution than "Obi-Wan" being the alias.

I mean, who on earth would ever think to come up with wild, convoluted theoriews on "why did people keep calling that guy in the movie 'Ben' and also he answered to the name??? We've got to figure out this deep mystery!"????

Some of the posters here, apparently. Perhaps they're cognitively deficient, but I prefer to assume otherwise.

Is it a "subjective opinion" that my avatar is "Darth Id," or do we all need to start generating elaborate EU-style epicyclical "theories" on why it always says "Darth Id" next to my comments?

No, that you go under the handle of "Darth Id" isn't subjective. The origins of the name and the motivations for you using it, though, are (at least to us outsiders who aren't privy to your innermost thoughts & feelings).