Not sure how I missed this thread.
Naming conventions are generally okay, just as long as it's not something that would cause undue strain on people.
Things like intentionally making a Jesus account, or a Hitler account will likely get you a ban hammer, but "Spoiler" names like Dark-Igor or Satanael are generally okay.
At this point, the people who are here have played the game, so being spoiled on something is mostly difficult. We still have one or two of them who are working on the game, but it's sparse enough that it's not that huge of a deal.
Just don't go into threads screaming story spoilers like what happens at the end of the game, or how certain confidants end, without being asked first.
And on a side note: Good luck with finding a name that isn't taken in that regard lol. 99% of all those names and combinations were taken within the first 3 months of this site's birth.