In regards to children getting where they shouldn't be, such as in the paths of bowlers, or more horrifyingly, down into the machinery, i have one huge gripe, and that is aimed at the parents.
Now, I am not targetting ALL parents. Kids do have a tendency to wander, especially young ones, and then there are the downright stupid ones, which i've unfortunately encountered a few of too.
What annoys me is when a child is retrieved from these dangerous situations- such as an example where i looked up from cleaning a machine to see an 8 year old about to look under and his friends bolting down the middle of the lane to join him- I sent them back quickly and firmly, and went to have a quick word to their parents, who simply looked up from their conversation, gave a few "yeah yeahs, oh that's awful" and went straight back to it. Meanwhile, the kid was a few metres back past the foul line. Parents did nothing, yet again.
This is an extreme example, but not uncommon! Bowling can be a dangerous sport, and it is the responsibility of parents to ensure they keep an eye on their children. The warnings are there, our staff will keep an eye out too, but ultimately, it is the parents that can quickest prevent tragedy, and to a lesser extent prevent inconveniencing neighbouring bowlers.