I called a disconcertion violation on a bench player years ago when I worked recreation basketball. I have never called it in a scholastic game, but that doesn't mean that I won't if it's merited.
Also, for all you IAABO officials out there who use IAABO signals. Do you realize that there is no IAABO signal for a delayed violation for disconcertion, or for a player violating the three point arc?
Here's the IAABO signal:
Note the caption. It's only for a "lane" violation.
The NCAA signal is much better, it covers all types of delayed free throw violations: "lane" violations, disconcertion violations, and three point arc violations.
Maybe there really is something to all those I Am A Blind Official jokes.