#406: Back Door Bus Thankers

It's nice that people getting off the bus thank the driver as they exit next to them via the front door on the transit system I'm using now (SF Muni has too bad of a history for people to do much of this).  But is it really necessary when people exit through the back door to yell "Thank you!" very loudly?  I mean, don't you think the driver already is thanked enough such that if you personally neglect to thank him / her that they will still feel appreciated by the hundreds of others getting off and thanking them throughout the day?  Severity: 1