Yes, there is no need for Open class players to display a special identity Icon.
This isn't because Open class players are not special too!! It is just that I anticipate that we may have some of the Conquest class players as well as some of the Predator class players who will post some slightly different opening spoilers and having the ID label right there up front in the spoiler post will help to perhaps avoid some confusion and miscommunications.
As an example, the Predator class players do not begin the game with "the wheel" or 25 extra gold as pre-popped goody hut benefits. So their opening research and trade decisions may be slightly different. It will be interesting to see how these factors equalize out by the end of the QSC period or perhaps the beginning of the middle ages.