I want to weigh in on the original topic of this post. I can think of a few reasons why most people would not want to post their name in the credits.
I will probably explain this poorly.
1) Recognition. If/when I am ever credited in a mod or video project, I want to be credited as Xuul, since anyone in the community knows me as Xuul and I operate on that handle. If a project credited me as "Justin Trudeau" instead of "Xuul" it would actually make it less clear that I was involved. My identity in the community is Xuul and not "Justin" or anything else.
2) Anonymity. Some people for professional, personal and/or Superhero related reasons with to keep their secret identity hidden. This is because some people on the internet have no concept that the internet is filled with real people and is in fact part of the real world.
Some people have VERY strong opinions on mods. Since everything I make has a comment box right below it some people decide to be jerks. You might "benefit" by being thought of a part of a group "The TSLRCM Team" whereas I am clearly identified as an individual.
I had a Neo-Nazi aggressively commenting on and spamming nonsense on one of my videos when I deleted his racist comments. One dude sent me a a very angry, aggressive email, accusing me of being sexist for my "Non-Skimpy Female Armor Mods for Skyrim" series. Because misandry or something. In both cases it could have just been a troll or someone real, either way it is unpleasant and annoying to deal with.
I am not like really worried about these people or the other various trolls who I deal with on occasion. I just don't need to deal with this outside YouTube on a Facebook, or in my personal email. On top of this is the sheer entitlement of some people who see me as their personal tech support calling me or messaging me in real life. 99% of people are not the problem, but all it takes is one bad apple.
Oh man, sorry to hear. People can be crazy on the internet. They'll do anything to tear you down.
I'm happy I am able to keep a low profile so far. Then again, I don't have a sizeable fan-base and I also don't respond to comments on anything, anywhere, ever.