Many years ago, I was waiting in the Post Office line and got to talking with a WT football player. He was exceptionally polite and friendly, and I emailed the football coach, telling him so.
Coach responded that he appreciated the email, and that they would read them out in team meetings
I would encourage anyone who has a positive encounter with a student athlete, or anyone representing a college, that you take a few seconds and email the prof/coach/administrator.
Lord knows, they probably get a lot of complaints about the few bad apples.