Here you answered the point I made in your "gripe" thread. I'm not critizing or anything, believe me, but from what you're saying, your kids DID hit this guys head once in a while even though you seemed very aware, conscious of the whole situation and as polite as you could be.
Here's the dilemma though. You mention that his head was too close to the rope. So I guess there are FOUR transgressions in the little scenario.....HIS, for having his head too close to the rope,YOUR KIDS, for swinging the rope, the OTHER KIDS, for swinging the rope and the OTHER PARENTS for "being oblivious" (I have know idea if they were busy doing something, weren't aware of the transgression their kids were commiting, or purposely sitting there thinking that hitting the guys head was "cute" behavior for their kids.)
I think it's OK to verbalize things that annoy you, but on the other hand, perhaps it should remind us to be more patient and understanding and realize that at any given moment WE may be the "annoyer".
There are thousands of people in a very small area, there are miles of ropes, there are people walking fast, people walking slow,
ECV's, strollers, people that don't know the parks like the back of thier hands like we do and occasionally stop, yes, mid stride, to look where they are, kids and parents that are hot, tired, hungry, rude people, well, the list goes on, but everyone is "trying" to have a nice vacation and the majority of "transgressions" are unknowingly committed and unintentional. Hopefully next time we go we realize this and spread more magic than dirty looks.