My experience is the guys on the train really appreciate you 'foamers' (the name for fans where i ran train). Depending on the run i was on i might see at least two or three groups posted up by the tracks taking pictures of the motor a week. It's nice to have people excited about what you're doing, even if its boring as hell for you, and of all the people milling around the tracks foamers had the most fun and stayed safely out of our way so were the folks we like the most.