Instead, youth organizations would probably use their data determine how to solve these problems. Regarding your question about whether or not there has been an increase in violence associated with youth sport in recent years, that is hard to say since there is no central agency collecting this kind of data. However, a interesting phenomena has occurred over the past 20 years, and the last 10 in particular. News organizations seem to be reporting these incidents with increasing frequency. Perhaps this coincides with an increase in the number of kids who play in community programs of all types.
More kids means more incidents of all types.
Some of those events are good, but generally speaking, good news is not news. The bottom line right now is that we do not know if there are more incidents or that the media is reporting anything they can find. It goes without saying that a prime purpose of the media today is to collect dirt. Dirt that is associated with kids and sports is the kind of news on which they seem to thrive. Actually, they thrive on any kind of dirt on any topic.