Please don't close the doors without actually sticking your head out to check
I realize you need to keep the trains running on time, but please don't close the doors without checking to see if there's anyone left. I was in line, waiting my turn to enter. Happened to be the last one when you decided to close the doors. It wasn't a big crowd, perhaps 8 people. I did not do that obnoxious thing where people are late and jam the doors, or indeed, once someone threw their bag and successfully kept the doors open once. It wasn't even rush hour, and I don't appreciate it when TOs can't be bothered to check during non-busy hours to see if anyone's left.
Between this and the three (!) escalators I saw that were out of service yesterday, it makes me glad I ride BART very rarely now.