I think there should be a bigger emphasis on making sure you actually hit your lie. I pay attention to it when I throw, and sometimes I have to pay so much attention that I have to pay less attention to my shot. If it's a tricky lie and I don't feel I can hit the spot with a run-up, then I have to throw a standstill. The rules never say you're guaranteed to have an easy run-up.
But I'm still a wuss about calling them, and I justify it to myself with lame excuses like "well it didn't help him anyway". And I shouldn't justify it like that. If I have to pay attention to my lie, you should have to pay attention to yours.
I heard a surprisingly pithy statement at a players' meeting a few months ago when the TD was making a plea to make sure we all follow the rules as accurately as we can: "The rules aren't there to punish you; the rules are there to make sure everyone is playing the same game."
One card might call foot faults to the inch. The next card might let their players get away with missing their mark by 6 inches. The next card might let their players miss by a whole foot. And that's pretty much completely unfair. The only fair way to do it is to follow the rules to the letter.
Kinda the same thing with tap-ins during more casual play. One group might call everything within 2' a gimme where another group doesn't make you putt anything inside 10'. Where do you draw the line for a gimme putt? How about drawing no line and making everyone putt every putt.
Perhaps I'm missing it, but I've never been able to find an actual rule that specifies how close you need to be to the marker. All I can find is that you need to be behind the marker, relative to the basket, and can't touch the marker until after you release your throw. I think we see so many foot faults because this isn't specified, causing a lot of players to think they need to be on top of the marker.
Most of the rules in the PDGA rulebook state that you have be "touching the lie" or "making contact with the lie" or something like that. Which, of course, means we need to figure out how they define "lie".
http://www.pdga.com/rules/official-rules-disc-golf/800-introduction/80002-definitions
Lie
The spot on the playing surface behind the marker, upon which the player takes a stance in accordance with the rules. It is a line 30 centimeters in length extending back along the line of play from the rear edge of the marker disc. The lie for the first throw on a hole is the teeing area. A drop zone is also a lie.
Line of Play
The imaginary line on the playing surface extending from the center of the target through the center of the marker disc and beyond.