Many, of course, don't adhere to the dos and don'ts, making for a pretty uncomfortable social situation.
Delhi-based media professional Nayanita Singh says she avoids sitting in a train's general compartment because of bad smells.
"I hate travelling in the general compartment. I get so irritated because of the bad smells - body odour, smell of the alcohol, or you never know if someone farts too. It's irritating," she complained.