Looks like crime has been on the rise tge fast few yearsTrue -- but it was also shown that about 20 years after leaded gasoline was banned, state-by-state, each state showed a significant drop in crime rates and incarceration. The leaded gasoline does definitely have an effect, though I believe the greatest effects are those on young children whose brains are still developing. A friend of mine has a daughter who suffered significant lead exposure when they remodeled their older home, and is not quite normal as a result.
My experiences with lead ball echo what other members here are saying; it fragments far less than high-power rifle bullets. But... I still don't keep meat anywhere near the wound channel. The acidity of the human stomach would certainly dissolve some lead if it's ingested. Lead exposure at any age is not a good thing. A coworker's father was a plumber back in the day, with loads of lead exposure. She described him as "batsh*t insane", which she attributed to that exposure.
Correlated in time is not the same as correlated in cause
Since commercial jet service for civilians starred there has been an increase in reported rapes, must me planes are a phallic symbol.