Open display of personal weapons might be purely symbolic, too. Other "alternative timelines" do it a lot...
Agreed, but I found this piece of dialogue from "Yesterday's Enterprise" interesting:
KLINGON [OC]: Federation ship Enterprise. Surrender and prepare to be boarded.
PICARD: That will be the day.
Considering the ship was about to have a warp core breach, I found these Klingons rather bold, but apparently their goal was not to destroy ships (like in a "total war") but to capture these.