Any time I'm in a position to mentor students or young workers, that's always always the information I pass on. (I usually say "secretaries rule the world." ) Anyone who treats my staff poorly, I will know about it and it will affect my opinion of you. Support staff are hugely important and can make your life so much easier or so much harder after you're hired too! Always maintain a good relationship.
I've always known that truism from my maternal grandmother who was a secretary for many years. And because of that, I'm fairly certain I got a job because of one. I misunderstood what time my interview for a temp position was going to be and showed up an hour and a half early. There really wasn't any cafes I could hang out at, so the kind lady in charge of the front said it was fine for me to sit in the waiting area until my appointment. When she saw I was reading a fantasy book(I don't remember what it is now, just something I'd gotten from the library) she asked if I'd read specific authors. So in between her calls, talking to other folks, the two of us happily geeked out over books, movies and World of Warcraft.
When I had my interview with the recruiter, the interview made a casual comment about the good impression I'd made, unlike some others, and that it was rare for that lady to compliment someone like she did with me. I don't remember my exact response, but I do know I made the recruiter laugh. Besides, having been in customer service for so long, I know what it's like to get dumped on, I'm certainly not going to do to another person!