Point #1 is selectively out of context. Here is the full context: [bold = my emphasis]

"You must select a user ID to identify you to Three Rings and other users of
the Spiral Knights web site. You may not select as your User ID the name of
another living person (unless it is also your name), a name for the purpose of
fraud or disparagement, or a name that violates any third party's trademark
right, copyright, or other proprietary right, or which Three Rings deems in
its sole discretion to be vulgar or otherwise offensive. Three Rings reserves
the right to delete any vulgar or otherwise offensive User ID, or to require
you to change your User ID.

It outlines that OOO reserves the right to delete or change any vulgar or offensive ID. I could name myself Bob if that is a name that I use, you know... because there is that area in the quote that I bolded.

Point #2.
This is basic copyright law. Ever dealt with copyright law? It is a big mess, but this is the legal way of saying "if we want to press charges on you for taking our idea and using it for you own advantage, we can". Do companies press charges on translating or writing fiction for a game? Only when the person is making a profit on the company's idea.

Jempire made this fan made game. It is likely that they contacted OOO support prior to releasing it, but it obviously is in violation of this part of the ToS. No locked thread in the year that it's been released. If Jempire wanted to sell it, I bet you the story would turn out differently.

Point #3.
Again with the selective editing of context. Here is the unedited text:

" 2. permit any other person (including but not limited to a former member
whose account Three Rings has terminated) to access Spiral Knights, or
create or provide any other means through which the Games may be played
by anyone besides you (e.g., through server emulators);"

Sure reads to me like you can't make an account for someone else. That someone else has to make the account themselves.

Moral of the story:
Contact support to have them clarify if you want to do something that would be against the ToS.
Certain things that are technically against the ToS are allowed, but it is difficult to identify all the little things to allow/disallow in a legal format. Written requests and permission [in the form of support requests] trump the ToS.

I believe the restrictions in names is full names, not first names. With just a first name, your name is too ambiguous to be referencing/defaming any one person or franchise. (Plus it's near impossible for Three Rings to prove that's not your name) For instance "Duke", or "Jim". It's only a problem once you add the "Nukem" or "Carrey", respectively, and makes it far easier for OOO to doubt the validity of your name.