Crazy how high some of the % are from people on this forum. My gut when I saw it was 1 - 5% of actual deliberate cheating, but that is far from the consensus it seems.
I just assume people are not that pathetic.
I think pencil whipping is probably the worst thing you could do. When I'm playing a tournament I ALWAYS know what everyone took on the hole. I do this to prevent pencil whipping. I also politely ask the score keeper to call out names and scores, including themselves to keep everything honest if they are not already. I have had to correct someone when they have a blow up hole about a dozen or so times in my 8 or so years of playing. I catch a vibe and typically feel like I know if it was a deliberate whipping attempt, or someone honestly lost their head enough to not remember how many throws - I have yet to do that in my disc golf life. Bottom line as long as the card reads correct, I'm happy and sometimes I learn the true character of someone out on the course. If multiple OB shots are involved and you loose your head on a hole it can be legitimately difficult to add up a score. When those kind of things are happening I typically pay close attention and speak to a card mate to make sure we are on the same page before scores are announced - so I'm not the "guy" who has to correct him.
Reading this makes me a bit paranoid though - where the heck do you all play disc golf???? With that said, I play in the Open division and I have certainly observed a lot of falling putts in the rec division over the years. That is where you find the first timers and in my experience if the rules are clarified cordially by card mates it's typically not met with any type of adversity from the offender.
I'm not a rules Nazi, although we should probably all be, since it would make calling out your card mate far less Taboo when something does occur. Disc Golf tends to have that "chill dude" culture that makes calling a violation awkward at times. I don't really give a **** about that though.
* The 3 min rule - I feel like this rule is in place for speed of play. I always keep an eye on the previous hole and will let a player search beyond the 3 minute mark if I genuinely believe it will not cause a speed of play issue. There can certainly be a snow ball effect with this that will affect many players beyond a single group, so it is an important rule, but it's also the WORST way to loose strokes and I hate to put it on someone. There is also the fact that you are icing your card mates to some degree, but again, I make a judgment call on these. Also, everyone on the card MUST be actively looking before 3 min begins - not sure if that's part of the rule or just my opinion.
*Foot Faults - Basically, if it's an open field and I feel like a player is making every effort to plant properly, and it is not a chronic problem, I have ignored many of foot faults. Not saying it's right, but we play on weird terrain and it happens to even the best players. On the contrary, if the lie is somewhat obstructed and the player gets a distinct advantage with a foot fault I will call it. I will of course call anyone who is foot faulting on the regular.
*Backing into a lie - I just looked in the rule book and did not locate it but I thought there was a rule on addressing you lie with "minimum" impact on the surroundings or something to that degree. This is kind of a funny one and I think even the most honest people are guilty of addressing a lie in the thicket like a rhinoceros from time to time. Or stomping there way through some prairie grass on there way in. If there is no actual grabbing or moving of branches, etc I tend not to call this one. My local players and I kind of joke around about it and we will address it up front before someone makes there way in - "Dude, don't go trampling in there now..."
Part of competition is knowing how to operate within the rules, and sometimes that means really close to the "line". You see it in every sport. Creatively addressing a lie in disc golf falls under this sort of rules dance as well as making an argument your are in bounds, given the benefit goes to the player. I have had many "touching that blade of grass" conversations when OB lines are not clearly marked. I hate that one because to me everyone can draw an imaginary line in their head and it's pretty damn obvious when someone is OB even if the line is marked poorly.