not true at all
The Section 112/113 aisle is on its 4th usher now in my 11 years as a STH, and I have known them all by name and vice versa. I have discussed with them about their kids and life issues and vice versa. 2 of the former ushers were "promoted" to courtside duty and they still say hi to me and chat a bit when I get down to the court on rare occasions.
On one occasion earlier this year, KMart's dad was in town for a few games and was on the court near the Kings bench after the game chatting with a few folks. Kingsgurl and I went down to visit with him for a while and we got stopped by an usher behind the Kings bench. Our good buddy ex-112/113 usher Wally (one of the courtside ushers now and who knew we knew the family) walked over to tell the guy to let us on the court to visit.
BTW, if you didn't pay for a lower level seat and sit next to mine, you will be gone in short order.