From my observations, over several years of hanging around ball parks, it seems that umpiring is probably just below coaching as far as respect! Most parents can't fathom the possibility that there little Johnny could possibly be just average. Which means he is going to make some errors and strike out at least occassionally. So this means that either the coach messed up or the ump blew the call. It's funny how when the team is winning and Johnny is playing good, that you don't hear much from these parents. But, lose a couple games or let Johnny go hitless or make a couple of errors, then the complaints start flowing. If they can't get any support for their feeling that it is the coaching or the umps, field conditions usually start getting commented on. Anything other than Johnny! All of this is usually followed by mentioning the possibility of transferring to a school where Johnny's talent would be better suited. (Usually a smaller school or possibly even a private school) Where Johnny can get better coaching and play on a better field while playing against schools that almost gaurantee success and a winning record.
I usually see some questionable calls at any game, little league, high school, college, even pros. But rarely does one call or one ump cost a team a game. There are some umps that are too old or even too young and inexperienced, but they are calling the same game for both teams. You just don't see "homers" calling in sports these days. I think that in most instances, the one factor that influences a kid and his future are the parents. They set the pattern that the kid will live his life by and when they set an example that it is always someone elses fault, the kid grows up thinking that and will most likely never be a success. Parents can't protect their kids from all of the adversity they will face in their life, but they can prepare them to overcome adversity if they will just encourage them and help them to fight through tough times including bad umpires calls!
I know I got a little carried away, but it seems there are just so many parents these days that try to protect and hide their kids from experiencing life by always blaming somebody or something else when the child faces failure and hard times. Failure, frustration, disappointment and mistakes are all part of life. The kid has to learn to deal with these things in order to be a success in life or sports.