We were on an RCCL excursion in St Lucia once that got back just a few minutes before sail away. There were about 25 of us. Of course, we weren't running to get to the ship but there were people on some of the balconies pointing and laughing as if we had done something wrong. I wasn't amused. Common sense would tell you if a large group is that late, it's most likely an RCCL excursion.