I've got a buddy who refs high school football. He tells me "If I wanted to, I could throw a flag on every play." Travelling, carrying, double dribble and any of the other time violations depend on an official being right there and seeing it happen, plus having an awareness of the clock, all while trying to keep track of 10 players on the floor (and multiple coaches on the sideline). I think most refs look at 1. Egregious or 2. multiple counts before they make some of their calls.
Here's how the rule reads (as Googled, and as we all know, there's NOTHING smarter or more correct than Google, TIC) The three-second rule in basketball is one of the most debated basketball rules in basketball. The rule states that once a player has established a position in the restricted area, they are not allowed to remain there for more than three consecutive seconds unless they are preparing to shoot or pass.
So that last part leaves a lot open to individual interpretation; Zach is the definition of a player who is looking for the pass to always come to or come from him. Having said that, I actually tried to pay attention during the PSU game to how long Zach was in the paint. he's a smart player; if "in position" means both feet firmly in the paint, he gets around by stepping out and moving side to side, to the point of just putting one of those size 20's 5 inches out of the paint. I saw at least one instance during the game where was nothing but black under his sneakers for at least 5 seconds. I also heard one of the announcers say "That's 3 seconds. That's 3 seconds, isn't it?" So that would be two known violations in 2 halves. Again, it's easy for me sitting at home to see it, and for the announcer for the same reasons, but the ref(s) has a lot more going on.
The purist in me thinks about the sport(s) that were created to support, promote and mold young men and women into better adults and good citizens; part of that is playing by and following the rules and teaching these young people they NEED to follow them. I also realize that if that actually took place, calling a foul/penalty every play would quickly kill the sports. What coach used to say "If you're not getting called for penalties, you're not trying hard enough"? Kind of a sad way to play the game.