Regiment names are not going to be forced, but the ranks quite possibly are. This is not 100% due to historical accuracy.
The discussion (there was one, and it was lengthy) was centred around the benefits of giving freedom of choice over the benefits of for instance having a global rank structure. This means that everyone can easily see and recognise what a rank means, and we can use this system coupled with our medals and clan ranking to basically put another layer on the individual player. As in, instead of getting to call his private rank spacetrooperz.. He can instead be shown to be a Private of the 103rd (Fighting Dogs) and we can also show their clan rank, with his rewards, his medals etc.
With the sole exception of the Russians*, I've yet to see a ranking system that isn't easily recognisable. Thus the issue isn't very.. prominent in the community. The one space-based regiment I've run into (The 00th, of course.) has a very simple to understand system in place. I simply see no reason to restrict what ranks one could use simply because of a fringe-group of people, who haven't, as of yet, even appeared in the community.
[* This is with historically correct ranks, as well.]
Edit; And as a further note, I really don't see why ranks would even be important. Perhaps I am alone, but when I play games, I don't play them to show off that I'm a leader, but to enjoy the game itself. (Hence my lack of identifying signature, actually.)