I've never called any violations in my three tournaments. I did have a foot fault called on me in my first ever tournament, by somebody not in my division, because I misunderstood the rule. It is interesting to point out, however, that the people who called didn't make me re-putt - so they called the rule but didn't properly assess the penalty.
I personally think it's really ****ty to expect everyone to call every violation they ever see, even if is the "right" thing to do. Because disc golf is such a mental game, and I have a mind that won't shut up, calling a violation isn't so simple as just call it and move on. It would get into my head, for a few different reasons, and affect my ability to play my best. Screw that!
Calling time violations seems like the hardest thing for to call. It would take a large amount of concentration away from my game (rather than thinking about my next shot, I'm watching a stopwatch) and it could be somewhat difficult to "prove" in certain circumstances.
Not very many of us who advocate for enforcing the rules are saying "call every violation you ever see,...." Quite the contrary, our objective is to prevent violations from occurring at all so there's no need to call a bunch of stuff, rather than try to police violations all the time without letting people know or helping them get it right. Again, a little preventative work, giving an unofficial warning between holes, can deal with that. You can now find a way to not be in violation and still keep your focus. And it should be appreciated.
Wonder how many tournaments he had played and how many foot faults he had committed in those tournaments because no one had called him on it before? That's part of the trouble with folks not saying anything (no friendly reminders, no official warnings/calls, nothing) when they see violations...people don't learn. In the long run, that guy's better off for having been called on it because now he can address and fix it.
I played a casual round this morning with a couple guys. Both relatively new, just finishing their first year of competing seriously in tournaments. Noticed on the first hole that one of them stepped off the front of the box on his tee shot. It was one of those instances where he planted at the very edge of the pad and pivoted on his heel so that most of his foot was in the dirt at or just after release. Close call...didn't say anything as it was just a fun game and all. Two holes later, he did it again. Then a third time. On the fourth time he did it, it wasn't even close as his entire foot was completely off the front of the tee even before he pivoted. So I asked him if he knew he was faulting when he did that. He didn't know he was even doing it at all, let alone against the rules. No one had ever said anything about it before and the other guy with us, who plays with him more often, confirmed he's seen him do it a few times a round but never said anything.
He'd been playing MA2 all year and is planning to make the jump to MA1 for next year. He was glad I pointed it out and is going to work on correcting it so he doesn't get called in tournaments in the future. I'm equally surprised and not surprised that he's played 6-7 tournaments already this year and he was never called on it, friendly warning or otherwise. It's the culture of the game, unfortunately.
See... in reality it is appreciated -- NOT policing, but getting people to know, understand, and follow the rules..