I have sometimes gotten complaints when the kick is out towards the touchline a bit and the wall is not two solid gridiron white lines away. "Ref! That's not 10!" "It's the hypotenuse of the triangle. Haven't you taken geometry?" TOTAL silence.
"WE NEED A BALL BEHIND THE GOAL!" ... said the coach. Hey coach, we started with 3. Yes, I see all three have gone onto other fields or the parking lot. What exactly would you like me to do about it? I'm certainly not going to chase them. See all those parents? Or the kids on your bench? Sigh.
One that bugs me is when you have that dreaded IDFK on the 6 yard line just outside the goalpost. The first player gets on the goalline against the post and then by the 3rd player they're already a yard off the line with the players continuing to bend into a wall. NOPE. You need 6-7 yards of players lined up on the goal line between the posts before you can start coming off the line and not be within 10 yards.
I almost think the Law should be changed on the GA IFK. (Indeed a sorta change was made with 8 seconds/CK.) except with pliable youth, it is all but impossible to set up and manage properly. I’ve only seen it a few times in professional games, and it none of them was it done properly. (With, of course, the infamous MLS game where the kick was incorrectly moved to the side of the goal area and the defense was permitted a wall perpendicular to the goal line e at the post.)
It's a pet peeve of mine when my CR partner retrieves only one ball for the match and you have to wait forever for another ball to come in....or for the keeper to jog 30 yards for a ball. Absolutely senseless and their ok with it and have no pride. I ask for 3 during check-in (give 2 to the goalie's to put behind the goal) and "remind" the coach that it's the home teams responsibility to chase after the loose balls so that we always have 3. This usually generates a shocked look on their face, regardless if it's academy or club matches.
Personally, I would change the LOTG so that all offensive IFK inside the penalty area are moved to the top of the penalty arc. It would be easier to manage since the penalty is ten yards away. All we would have to say is "All defenders need to be behind the penalty mark."
What an optimist--you'll say something that teens will pay attention to? My experience (on average surely at lower skill levels than yours) is more like socal's. Two of my favorite memories of 30+ years as a low-level referee come from IFKs after passback calls. Perhaps five years ago, I did a U16B game with only one AR (who might actually have been older than me). As time was running out in the second half, I made a passback call against the keeper at the end (and side) of the field farthest from the sole AR. A defender had passed the ball to the keeper, who collected the ball wide of the penalty area but then picked it up as he approached the outside edge of the goal area. After minutes of cajoling and explaining, I finally gave up and perpetrated one of the worst examples of referee positioning I've ever seen. I stood on the goal line, in the mouth of the goal, at the point that was ten yards from the ball. I informed the defenders that they could be on my right only if they were on or behind the goal line (not with even one foot forward). If they wanted to be off the goal line, they had to be to my left. I stayed there until the kick blasted into the wall and caromed back into play. And then I ended the game.
I get it's difficult to manage, but going from 6 yards out to 22 yards seems a bit excessive. Even prior to reading this response, I was going to say move it to 10 yards from the endline still parallel to the offense. You're still dealing with players on the edge of a long wall being allowed to be closer though. That said, centering it 6 yards out on the goalline would simplify mangement. 10 yards is 4 yards outside the goalposts meaning all players would need to be on the goal line without dealing with the wall bending at all. It gives the offense a potential advantage depending on where the offense occurred, but I'm okay with that.
At the end of my kid's U14 game, One of our kids got kicked in the head in the box while going up for a corner. The ref called for an indirect free kick, because "a high kick is always indirect"
If the player got kicked, actual contact was made, then it becomes a foul for kicking instead of just a dangerous play. You would probably also have to consider some kind of misconduct as well.