climbing etiquette is indeed very important. esp so when you are not climbing in your homeground. it goes out to show what kind of climber you are as well.
EG : often, climbers will unintentionally rush to the wall to do a route or to start your training (when actually someone else is on the same wall doing a more difficult route or already dying after doing his 10 X 6A route), thus climbing etiqutte comes in here, you should come down the wall ... (and not the person who is trying the more difficult route or when he is just 2 tiles away from his last 6A route.)
bottom line : just pay more attention to your environment, esp the new climbers. and me...
just a note to our junior climbers, and a reminder to senior climbers like MYSELF! to pay attention to our own climbing etiquette in the gym, esp when not in homeground. =)
