Telling people off for it in game, yes.
But did you read the name of this forum? Background. Not role-playing. Background.
"Discussions about history, medieval weapons and society and other background or philosophical talk"
Not about light fantasy here. About the history side of it. I would never get on a person IG for silk lining, gold fringing, or plate armor in game, nor really generally on this forum or the wiki. Unless the discussion is specifically about history. That's what this part of the forum is about; so people can have a background resource to refer to.
Notably, BM is described as "a team-oriented browsergame merging strategy and roleplaying. It is set in a low-fantasy middle-ages world and players take the role of nobles and lords."
Low fantasy, yes. But not only low fantasy. Also middle-ages.
So you're right. Telling people off for wearing plate armor (plate mail is whole different animal) would be rude and hardly conducive to the game. But in a forum entirely concerned with the historical background then surely it isn't out of place to point out that error, along with myriad others?
