I shoot a lot of IDPA matches and am fortunate that the club where I shoot does a good job of stage design and management.
Me- Yes the 2 clubs I shoot w/ usually do good jobs. But I have also been slightly involved in setting up stages and have come across situations where it is real hard to think of every possibility while you are doing the design. Another stage of this match my squad happened to be the first to shoot one of the stages. We saw a potential problem and I dug out a sharpy and made a small change in the description that we all agreed would make things clearer for the rest of the squads.
The one thing I don't like about IDPA is that typically there is almost as much time spent discussing trickery and debating how clever one can be at bending the rules than there is shooting.
Me- Yep I see that sometimes too. Fortunately not too often. Also, at 75 my brain needs all the exercise it can get, so thinking and talking things through w/ better shooters than I helps.