I work with a lot of people who do research for a lot of things - one who specializes in historical criminal statistics.
He told me that once you start digging you find that when you use the same criteria used today that there is really a lot less crime per capita than ever, but because of the way communication and reporting has changed, the awareness level is making it appear way worse.
It is now easier to hear about incidents and the awareness that are not local and social stigma of reporting crimes has also changed. So now people are more likely to report 'weird Uncle Creepy' instead of hiding it as a family secret or a social system is less likely to find ways to hide it, or it is no longer an open secret that people don't talk about - it still happens, but not how it used to.
As few as twenty years ago there would be no way we would have heard about either of these cases unless we were local to the incident and there is a higher probability that the crime itself would either never been discovered or reported.
He also found that for the same reasons some crimes are now 'bigger' and better organized for the same communication reasons - it is much easier for like people to communicate with other like them
While, I agree with you. 7 coach, umpire, and teacher episdoes in the Houston area over the past few months still seems like a lot.