I took the train but did not buy a ticket, now I am feeling guilty.?
I do know everyone need to buy a ticket to take a train, a couple of days ago, I took a MARC(Maryland area rail commuter) train from Baltimore Camden to College park, at the Camden station, I did not find a ticket place so I got on the train and asked the attendant if I could buy the ticket on the train, he said yes and asked me to have a seat. So, here is the point, during the period of time from Camden to College park, no body come to me to check the ticket/ask me to buy one, that is different to my own country ( i am a foreign student).
What was i supposed to do at that time? thanks!
Dont worry about it, they probably overcharged someone else.
If it really bothers you, you can take that amount of money and donate to a local soup kitchen or charity, it will go to people that can use a lot more.
Welcome to the US! 
MARC Commuter Arriving at Brunswick
