If the seats are all full and bunch of you have to stand, DON’T CROWD THE BUS DRIVER. You’re blocking other people getting on and not once, ever, have I been on a bus were people were standing, that was no room to stand at the back. MOVE DOWN THE BUS! Most of the time there are even seats free (because it seems no one can look behind them when someone leaves the bus).
I have had buses pass by without stopping because they were full that could have fit a few more people if they hadn’t all been up at the front desperate to be the first ones off. (Regulations and passenger restrictions aside.)