I suspect what happened here is that the player changed his Steam name, not the RW IGN. I've had that happen a few times so now I spell out that they need to return to the main menu and edit their Profile to change the name.
I saw the guy on another server and saw that he had corrected this name. That server operator made a comment about the same subject. I have since made it a rule in the Journal that the name should be changed or face temporary ban which is done by UID. I think the ability to change the players name with a benign character is ok but I am sure it is easier than changing the code to strip the spaces in the console. It will be used in a variety of ways but as Red says there are much more ways that a plugin can infuriate a player including placing a visible tag on them.